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Message-ID: <AANLkTin9Qji_bdyd3yqrP_-ti5xRT9jJ4je2fPM=uHFX@mail.gmail.com>
Date: Fri, 24 Sep 2010 15:46:44 +0200
From: Par-Gunnar Hjalmdahl <par-gunnar.p.hjalmdahl@...ricsson.com>
To: linux-bluetooth@...r.kernel.org, linux-kernel@...r.kernel.org,
linus.walleij@...ricsson.com, Pavan Savoy <pavan_savoy@...y.com>
Subject: [PATCH 1/6] This patch adds support for the ST-Ericsson CG2900
This patch adds support for the ST-Ericsson CG2900
connectivity controller.
This patch contains the framework for registering users, chip
handlers, and transports as well as the needed files towards
the mach-ux500 board.
Signed-off-by: Par-Gunnar Hjalmdahl <par-gunnar.p.hjalmdahl@...ricsson.com>
---
arch/arm/mach-ux500/Makefile | 5 +
arch/arm/mach-ux500/cg2900_devices.c | 353 ++++
arch/arm/mach-ux500/include/mach/cg2900_devices.h | 120 ++
drivers/mfd/Kconfig | 8 +
drivers/mfd/Makefile | 1 +
drivers/mfd/cg2900/Makefile | 7 +
drivers/mfd/cg2900/cg2900_char_devices.c | 709 +++++++
drivers/mfd/cg2900/cg2900_char_devices.h | 36 +
drivers/mfd/cg2900/cg2900_core.c | 2287 +++++++++++++++++++++
drivers/mfd/cg2900/cg2900_core.h | 303 +++
drivers/mfd/cg2900/cg2900_debug.h | 77 +
drivers/mfd/cg2900/hci_defines.h | 102 +
include/linux/mfd/cg2900.h | 205 ++
13 files changed, 4213 insertions(+), 0 deletions(-)
create mode 100644 arch/arm/mach-ux500/cg2900_devices.c
create mode 100644 arch/arm/mach-ux500/include/mach/cg2900_devices.h
create mode 100644 drivers/mfd/cg2900/Makefile
create mode 100644 drivers/mfd/cg2900/cg2900_char_devices.c
create mode 100644 drivers/mfd/cg2900/cg2900_char_devices.h
create mode 100644 drivers/mfd/cg2900/cg2900_core.c
create mode 100644 drivers/mfd/cg2900/cg2900_core.h
create mode 100644 drivers/mfd/cg2900/cg2900_debug.h
create mode 100644 drivers/mfd/cg2900/hci_defines.h
create mode 100644 include/linux/mfd/cg2900.h
diff --git a/arch/arm/mach-ux500/Makefile b/arch/arm/mach-ux500/Makefile
index 46dbaf6..afafdd6 100644
--- a/arch/arm/mach-ux500/Makefile
+++ b/arch/arm/mach-ux500/Makefile
@@ -11,3 +11,8 @@ obj-$(CONFIG_SMP) += platsmp.o headsmp.o
obj-$(CONFIG_HOTPLUG_CPU) += hotplug.o
obj-$(CONFIG_LOCAL_TIMERS) += localtimer.o
obj-$(CONFIG_REGULATOR_AB8500) += board-mop500-regulators.o
+ifeq ($(CONFIG_MFD_CG2900), m)
+obj-y += cg2900_devices.o
+else
+obj-$(CONFIG_MFD_CG2900) += cg2900_devices.o
+endif
diff --git a/arch/arm/mach-ux500/cg2900_devices.c
b/arch/arm/mach-ux500/cg2900_devices.c
new file mode 100644
index 0000000..0aa6a07
--- /dev/null
+++ b/arch/arm/mach-ux500/cg2900_devices.c
@@ -0,0 +1,353 @@
+/*
+ * arch/arm/mach-ux500/cg2900_devices.c
+ *
+ * Copyright (C) ST-Ericsson SA 2010
+ * Authors:
+ * Par-Gunnar Hjalmdahl (par-gunnar.p.hjalmdahl@...ricsson.com) for
ST-Ericsson.
+ * Henrik Possung (henrik.possung@...ricsson.com) for ST-Ericsson.
+ * Josef Kindberg (josef.kindberg@...ricsson.com) for ST-Ericsson.
+ * Dariusz Szymszak (dariusz.xd.szymczak@...ricsson.com) for ST-Ericsson.
+ * Kjell Andersson (kjell.k.andersson@...ricsson.com) for ST-Ericsson.
+ * License terms: GNU General Public License (GPL), version 2
+ *
+ * Board specific device support for the Linux Bluetooth HCI H:4 Driver
+ * for ST-Ericsson connectivity controller.
+ */
+
+#include <linux/string.h>
+#include <linux/types.h>
+#include <linux/skbuff.h>
+#include <asm-generic/errno-base.h>
+#include <asm/byteorder.h>
+#include <mach/cg2900_devices.h>
+#include <linux/module.h>
+#include <linux/gpio.h>
+#include <linux/interrupt.h>
+#include <linux/delay.h>
+#include <plat/pincfg.h>
+#include "pins-db8500.h"
+
+#ifndef PIN_INPUT_PULLUP
+#define PIN_INPUT_PULLUP (PIN_DIR_INPUT | PIN_PULL_UP)
+#endif
+
+#ifndef GPIO_LOW
+#define GPIO_LOW 0
+#endif
+
+#ifndef GPIO_HIGH
+#define GPIO_HIGH 1
+#endif
+
+#ifndef GPIO_TO_IRQ
+#define GPIO_TO_IRQ NOMADIK_GPIO_TO_IRQ
+#endif
+
+/** BT_ENABLE_GPIO - GPIO to enable/disable the BT module.
+ */
+#define BT_ENABLE_GPIO 170
+
+/** GBF_ENA_RESET_GPIO - GPIO to enable/disable the controller.
+ */
+#define GBF_ENA_RESET_GPIO 171
+
+/** BT_CTS_GPIO - CTS GPIO.
+*/
+#define BT_CTS_GPIO 0
+
+/** GBF_ENA_RESET_NAME - Name of GPIO for enabling/disabling.
+ */
+#define GBF_ENA_RESET_NAME "gbf_ena_reset"
+
+/** GBF_ENA_RESET_NAME - Name of GPIO for enabling/disabling.
+ */
+#define BT_ENABLE_NAME "bt_enable"
+/** CG2900_DEVICE_NAME - Name for this module.
+*/
+#define CG2900_DEVICE_NAME "cg2900_driver"
+
+/** UART_LINES_NUM - Number of uart lines we want to configure.
+*/
+#define UART_LINES_NUM 4
+
+/* Bluetooth Opcode Group Field */
+#define BT_OGF_VS 0x3F
+
+/* Bluetooth Opcode Command Field */
+#define BT_OCF_VS_POWER_SWITCH_OFF 0x0140
+#define BT_OCF_VS_BT_ENABLE 0x0310
+
+#define MAKE_CMD(__ogf, __ocf) ((u16)(((u16)__ogf << 10) | __ocf))
+
+#define BT_VS_POWER_SWITCH_OFF MAKE_CMD(BT_OGF_VS, \
+ BT_OCF_VS_POWER_SWITCH_OFF)
+#define BT_VS_BT_ENABLE MAKE_CMD(BT_OGF_VS, BT_OCF_VS_BT_ENABLE)
+
+#define VS_BT_DISABLE 0x00
+#define VS_BT_ENABLE 0x01
+
+#define H4_HEADER_LENGTH 0x01
+#define BT_HEADER_LENGTH 0x03
+
+#define STLC2690_HCI_REV 0x0600
+#define CG2900_HCI_REV 0x0101
+#define CG2900_SPECIAL_HCI_REV 0x0700
+
+struct vs_power_sw_off_cmd {
+ __le16 op_code;
+ u8 len;
+ u8 gpio_0_7_pull_up;
+ u8 gpio_8_15_pull_up;
+ u8 gpio_16_20_pull_up;
+ u8 gpio_0_7_pull_down;
+ u8 gpio_8_15_pull_down;
+ u8 gpio_16_20_pull_down;
+} __attribute__((packed));
+
+struct vs_bt_enable_cmd {
+ __le16 op_code;
+ u8 len;
+ u8 enable;
+} __attribute__((packed));
+
+static u8 cg2900_hci_version;
+static u8 cg2900_lmp_version;
+static u8 cg2900_lmp_subversion;
+static u16 cg2900_hci_revision;
+static u16 cg2900_manufacturer;
+
+/* IRQ callback. */
+static struct cg2900_devices_cb *cg2900_dev_callback;
+
+/* Pin configuration for UART functions. */
+static pin_cfg_t uart0_enabled[] = {
+ GPIO0_U0_CTSn | PIN_INPUT_PULLUP,
+ GPIO1_U0_RTSn | PIN_OUTPUT_HIGH,
+ GPIO2_U0_RXD | PIN_INPUT_PULLUP,
+ GPIO3_U0_TXD | PIN_OUTPUT_HIGH,
+};
+
+/* Pin configuration for sleep mode. */
+static pin_cfg_t uart0_disabled[] = {
+ GPIO0_GPIO | PIN_INPUT_PULLUP, /* CTS pull up. */
+ GPIO1_GPIO | PIN_OUTPUT_HIGH, /* RTS high - flow off. */
+ GPIO2_GPIO | PIN_INPUT_PULLUP, /* RX pull down. */
+ GPIO3_GPIO | PIN_OUTPUT_LOW, /* TX low - break on. */
+};
+
+void cg2900_devices_enable_chip(void)
+{
+ gpio_set_value(GBF_ENA_RESET_GPIO, GPIO_HIGH);
+}
+EXPORT_SYMBOL(cg2900_devices_enable_chip);
+
+void cg2900_devices_disable_chip(void)
+{
+ gpio_set_value(GBF_ENA_RESET_GPIO, GPIO_LOW);
+ cg2900_dev_callback = NULL;
+}
+EXPORT_SYMBOL(cg2900_devices_disable_chip);
+
+void cg2900_devices_set_hci_revision(u8 hci_version,
+ u16 hci_revision,
+ u8 lmp_version,
+ u8 lmp_subversion,
+ u16 manufacturer)
+{
+ cg2900_hci_version = hci_version;
+ cg2900_hci_revision = hci_revision;
+ cg2900_lmp_version = lmp_version;
+ cg2900_lmp_subversion = lmp_subversion;
+ cg2900_manufacturer = manufacturer;
+}
+EXPORT_SYMBOL(cg2900_devices_set_hci_revision);
+
+struct sk_buff *cg2900_devices_get_power_switch_off_cmd(u16 *op_code)
+{
+ struct sk_buff *skb;
+ struct vs_power_sw_off_cmd *cmd;
+
+ /* If connected chip does not support the command return NULL */
+ if (CG2900_HCI_REV != cg2900_hci_revision &&
+ CG2900_SPECIAL_HCI_REV != cg2900_hci_revision)
+ return NULL;
+
+ skb = alloc_skb(sizeof(*cmd) + H4_HEADER_LENGTH, GFP_KERNEL);
+ if (!skb) {
+ pr_err("Could not allocate skb");
+ return NULL;
+ }
+
+ skb_reserve(skb, H4_HEADER_LENGTH);
+ cmd = (struct vs_power_sw_off_cmd *)skb_put(skb, sizeof(*cmd));
+ cmd->op_code = cpu_to_le16(BT_VS_POWER_SWITCH_OFF);
+ cmd->len = sizeof(*cmd) - BT_HEADER_LENGTH;
+ /*
+ * Enter system specific GPIO settings here:
+ * Section data[3-5] is GPIO pull-up selection
+ * Section data[6-8] is GPIO pull-down selection
+ * Each section is a bitfield where
+ * - byte 0 bit 0 is GPIO 0
+ * - byte 0 bit 1 is GPIO 1
+ * - up to
+ * - byte 2 bit 4 which is GPIO 20
+ * where each bit means:
+ * - 0: No pull-up / no pull-down
+ * - 1: Pull-up / pull-down
+ * All GPIOs are set as input.
+ */
+ cmd->gpio_0_7_pull_up = 0x00;
+ cmd->gpio_8_15_pull_up = 0x00;
+ cmd->gpio_16_20_pull_up = 0x00;
+ cmd->gpio_0_7_pull_down = 0x00;
+ cmd->gpio_8_15_pull_down = 0x00;
+ cmd->gpio_16_20_pull_down = 0x00;
+
+ if (op_code)
+ *op_code = BT_VS_POWER_SWITCH_OFF;
+
+ return skb;
+}
+EXPORT_SYMBOL(cg2900_devices_get_power_switch_off_cmd);
+
+struct sk_buff *cg2900_devices_get_bt_enable_cmd(u16 *op_code, bool bt_enable)
+{
+ struct sk_buff *skb;
+ struct vs_bt_enable_cmd *cmd;
+
+ /* If connected chip does not support the command return NULL */
+ if (CG2900_HCI_REV != cg2900_hci_revision &&
+ CG2900_SPECIAL_HCI_REV != cg2900_hci_revision)
+ return NULL;
+
+ /* CG2900 used */
+ skb = alloc_skb(sizeof(*cmd) + H4_HEADER_LENGTH, GFP_KERNEL);
+ if (!skb) {
+ pr_err("Could not allocate skb");
+ return NULL;
+ }
+
+ skb_reserve(skb, H4_HEADER_LENGTH);
+ cmd = (struct vs_bt_enable_cmd *)skb_put(skb, sizeof(*cmd));
+ cmd->op_code = cpu_to_le16(BT_VS_BT_ENABLE);
+ cmd->len = sizeof(*cmd) - BT_HEADER_LENGTH;
+ if (bt_enable)
+ cmd->enable = VS_BT_ENABLE;
+ else
+ cmd->enable = VS_BT_DISABLE;
+
+ if (op_code)
+ *op_code = BT_VS_BT_ENABLE;
+
+ return skb;
+}
+EXPORT_SYMBOL(cg2900_devices_get_bt_enable_cmd);
+
+static irqreturn_t cg2900_devices_interrupt(int irq, void *dev_id)
+{
+ disable_irq_nosync(irq);
+ if (cg2900_dev_callback && cg2900_dev_callback->interrupt_cb)
+ cg2900_dev_callback->interrupt_cb();
+
+ return IRQ_HANDLED;
+}
+
+int cg2900_devices_set_cts_irq(void)
+{
+ int err;
+
+ /*
+ * Without this delay we get interrupt on CTS immediately
+ * due to some turbulences on this line.
+ */
+ mdelay(4);
+
+ /* Disable UART functions. */
+ err = nmk_config_pins(uart0_disabled, UART_LINES_NUM);
+
+ if (err)
+ goto error;
+
+ /* Set IRQ on CTS. */
+ err = request_irq(GPIO_TO_IRQ(BT_CTS_GPIO),
+ cg2900_devices_interrupt,
+ IRQF_TRIGGER_FALLING,
+ CG2900_DEVICE_NAME,
+ NULL);
+ if (err)
+ goto error;
+
+ return 0;
+
+error:
+ (void)nmk_config_pins(uart0_enabled, UART_LINES_NUM);
+ pr_err("Can not set intterupt.");
+ return err;
+}
+EXPORT_SYMBOL(cg2900_devices_set_cts_irq);
+
+void cg2900_devices_unset_cts_irq(void)
+{
+ int err;
+
+ /* Restore UART settings. */
+ free_irq(GPIO_TO_IRQ(BT_CTS_GPIO), NULL);
+ err = nmk_config_pins(uart0_enabled, UART_LINES_NUM);
+ if (err)
+ pr_err("Unable to enable UART");
+}
+EXPORT_SYMBOL(cg2900_devices_unset_cts_irq);
+
+void cg2900_devices_reg_cb(struct cg2900_devices_cb *cb)
+{
+ if (!cg2900_dev_callback)
+ cg2900_dev_callback = cb;
+ else
+ pr_err("Callback already registered");
+}
+EXPORT_SYMBOL(cg2900_devices_reg_cb);
+int cg2900_devices_init(void)
+{
+ int err = 0;
+
+ err = gpio_request(GBF_ENA_RESET_GPIO, GBF_ENA_RESET_NAME);
+ if (err < 0) {
+ pr_err("gpio_request failed with err: %d", err);
+ goto finished;
+ }
+
+ err = gpio_direction_output(GBF_ENA_RESET_GPIO, GPIO_HIGH);
+ if (err < 0) {
+ pr_err("gpio_direction_output failed with err: %d", err);
+ goto error_handling;
+ }
+
+ err = gpio_request(BT_ENABLE_GPIO, BT_ENABLE_NAME);
+ if (err < 0) {
+ pr_err("gpio_request failed with err: %d", err);
+ goto finished;
+ }
+
+ err = gpio_direction_output(BT_ENABLE_GPIO, GPIO_HIGH);
+ if (err < 0) {
+ pr_err("gpio_direction_output failed with err: %d", err);
+ goto error_handling;
+ }
+
+ goto finished;
+
+error_handling:
+ gpio_free(GBF_ENA_RESET_GPIO);
+
+finished:
+ cg2900_devices_disable_chip();
+ return err;
+}
+EXPORT_SYMBOL(cg2900_devices_init);
+
+void cg2900_devices_exit(void)
+{
+ cg2900_devices_disable_chip();
+ gpio_free(GBF_ENA_RESET_GPIO);
+}
+EXPORT_SYMBOL(cg2900_devices_exit);
diff --git a/arch/arm/mach-ux500/include/mach/cg2900_devices.h
b/arch/arm/mach-ux500/include/mach/cg2900_devices.h
new file mode 100644
index 0000000..2db25b3
--- /dev/null
+++ b/arch/arm/mach-ux500/include/mach/cg2900_devices.h
@@ -0,0 +1,120 @@
+/*
+ * arch/arm/mach-ux500/include/mach/cg2900_devices.h
+ *
+ * Copyright (C) ST-Ericsson SA 2010
+ * Authors:
+ * Par-Gunnar Hjalmdahl (par-gunnar.p.hjalmdahl@...ricsson.com) for
ST-Ericsson.
+ * Henrik Possung (henrik.possung@...ricsson.com) for ST-Ericsson.
+ * Josef Kindberg (josef.kindberg@...ricsson.com) for ST-Ericsson.
+ * Dariusz Szymszak (dariusz.xd.szymczak@...ricsson.com) for ST-Ericsson.
+ * Kjell Andersson (kjell.k.andersson@...ricsson.com) for ST-Ericsson.
+ * License terms: GNU General Public License (GPL), version 2
+ *
+ * Board specific device support for the Linux Bluetooth HCI H4 Driver
+ * for ST-Ericsson connectivity controller.
+ */
+
+#ifndef _CG2900_DEVICES_H_
+#define _CG2900_DEVICES_H_
+
+#include <linux/types.h>
+#include <linux/skbuff.h>
+
+/**
+ * struct cg2900_devices_cb - Callback structure for cg2900_devices user.
+ * @interrupt_cb: Callback function called when interrupt on CTS occurred.
+ *
+ * Defines the callback functions provided from the caller.
+ */
+struct cg2900_devices_cb {
+ void (*interrupt_cb)(void);
+};
+
+/**
+ * cg2900_devices_enable_chip() - Enable the controller.
+ */
+extern void cg2900_devices_enable_chip(void);
+
+/**
+ * cg2900_devices_disable_chip() - Disable the controller.
+ */
+extern void cg2900_devices_disable_chip(void);
+
+/**
+ * cg2900_devices_set_hci_revision() - Stores HCI revision info for
the connected connectivity controller.
+ * @hci_version: HCI version from the controller.
+ * @hci_revision: HCI revision from the controller.
+ * @lmp_version: LMP version from the controller.
+ * @lmp_subversion: LMP subversion from the controller.
+ * @manufacturer: Manufacturer ID from the controller.
+ *
+ * See Bluetooth specification and white paper for used controller for details
+ * about parameters.
+ */
+extern void cg2900_devices_set_hci_revision(u8 hci_version,
+ u16 hci_revision,
+ u8 lmp_version,
+ u8 lmp_subversion,
+ u16 manufacturer);
+
+/**
+ * cg2900_devices_get_power_switch_off_cmd() - Get HCI power switch
off command to use based on connected connectivity controller.
+ * @op_code: HCI opcode in generated packet. NULL if not needed.
+ *
+ * This command does not add the H4 channel header in front of the message.
+ *
+ * Returns:
+ * NULL if no command shall be sent,
+ * sk_buffer with command otherwise.
+ */
+extern struct sk_buff *cg2900_devices_get_power_switch_off_cmd(u16 *op_code);
+
+/**
+ * cg2900_devices_get_bt_enable_cmd() - Get HCI BT enable command to
use based on connected connectivity controller.
+ * @op_code: HCI opcode in generated packet. NULL if not needed.
+ * @bt_enable: true if Bluetooth IP shall be enabled, false otherwise.
+ *
+ * This command does not add the H4 channel header in front of the message.
+ *
+ * Returns:
+ * NULL if no command shall be sent,
+ * sk_buffer with command otherwise.
+ */
+extern struct sk_buff *cg2900_devices_get_bt_enable_cmd(u16 *op_code,
+ bool bt_enable);
+
+/**
+ * cg2900_devices_init() - Initialize the board config.
+ *
+ * Returns:
+ * 0 if there is no error.
+ * Error codes from gpio_request and gpio_direction_output.
+ */
+extern int cg2900_devices_init(void);
+
+/**
+ * cg2900_devices_exit() - Exit function for the board config.
+ */
+extern void cg2900_devices_exit(void);
+
+/**
+ * cg2900_devices_unset_cts_irq() - Disable interrupt on CTS.
+ */
+extern void cg2900_devices_unset_cts_irq(void);
+
+/**
+ * cg2900_devices_set_cts_irq() - Enable interrupt on CTS.
+ *
+ * Returns:
+ * 0 if there is no error.
+ * Error codes from request_irq and nmk_config_pins.
+ */
+extern int cg2900_devices_set_cts_irq(void);
+
+/**
+ * cg2900_devices_reg_cb() - Register callbacks from upper layer.
+ *@cb: Callback structure from upper layer.
+ *
+ */
+extern void cg2900_devices_reg_cb(struct cg2900_devices_cb *cb);
+#endif /* _CG2900_DEVICES_H_ */
diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
index fbfe14a..c0a6652 100644
--- a/drivers/mfd/Kconfig
+++ b/drivers/mfd/Kconfig
@@ -576,6 +576,14 @@ config MFD_TPS6586X
This driver can also be built as a module. If so, the module
will be called tps6586x.
+config MFD_CG2900
+ tristate "Support ST-Ericsson CG2900 main structure"
+ depends on NET
+ help
+ Support for ST-Ericsson CG2900 Connectivity Combo controller main structure.
+ Supports multiple functionalities muxed over a Bluetooth HCI H:4 interface.
+ CG2900 support Bluetooth, FM radio, and GPS.
+
endif # MFD_SUPPORT
menu "Multimedia Capabilities Port drivers"
diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile
index d5968cd..e3d8206 100644
--- a/drivers/mfd/Makefile
+++ b/drivers/mfd/Makefile
@@ -78,3 +78,4 @@ obj-$(CONFIG_MFD_RDC321X) += rdc321x-southbridge.o
obj-$(CONFIG_MFD_JANZ_CMODIO) += janz-cmodio.o
obj-$(CONFIG_MFD_JZ4740_ADC) += jz4740-adc.o
obj-$(CONFIG_MFD_TPS6586X) += tps6586x.o
+obj-y += cg2900/
diff --git a/drivers/mfd/cg2900/Makefile b/drivers/mfd/cg2900/Makefile
new file mode 100644
index 0000000..76af761
--- /dev/null
+++ b/drivers/mfd/cg2900/Makefile
@@ -0,0 +1,7 @@
+#
+# Makefile for ST-Ericsson CG2900 connectivity combo controller
+#
+
+obj-$(CONFIG_MFD_CG2900) += cg2900.o
+cg2900-objs := cg2900_core.o cg2900_char_devices.o
+export-objs := cg2900_core.o
diff --git a/drivers/mfd/cg2900/cg2900_char_devices.c
b/drivers/mfd/cg2900/cg2900_char_devices.c
new file mode 100644
index 0000000..709689b
--- /dev/null
+++ b/drivers/mfd/cg2900/cg2900_char_devices.c
@@ -0,0 +1,709 @@
+/*
+ * drivers/mfd/cg2900/cg2900_char_devices.c
+ *
+ * Copyright (C) ST-Ericsson SA 2010
+ * Authors:
+ * Par-Gunnar Hjalmdahl (par-gunnar.p.hjalmdahl@...ricsson.com) for
ST-Ericsson.
+ * Henrik Possung (henrik.possung@...ricsson.com) for ST-Ericsson.
+ * Josef Kindberg (josef.kindberg@...ricsson.com) for ST-Ericsson.
+ * Dariusz Szymszak (dariusz.xd.szymczak@...ricsson.com) for ST-Ericsson.
+ * Kjell Andersson (kjell.k.andersson@...ricsson.com) for ST-Ericsson.
+ * License terms: GNU General Public License (GPL), version 2
+ *
+ * Linux Bluetooth HCI H:4 Driver for ST-Ericsson connectivity controller.
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/skbuff.h>
+#include <linux/file.h>
+#include <linux/fs.h>
+#include <linux/device.h>
+#include <linux/poll.h>
+#include <linux/mutex.h>
+#include <linux/sched.h>
+#include <linux/miscdevice.h>
+#include <linux/list.h>
+
+#include <linux/mfd/cg2900.h>
+#include <mach/cg2900_devices.h>
+#include "cg2900_core.h"
+#include "cg2900_debug.h"
+
+/* Ioctls */
+#define CG2900_CHAR_DEV_IOCTL_RESET _IOW('U', 210, int)
+#define CG2900_CHAR_DEV_IOCTL_CHECK4RESET _IOR('U', 212, int)
+#define CG2900_CHAR_DEV_IOCTL_GET_REVISION _IOR('U', 213, int)
+#define CG2900_CHAR_DEV_IOCTL_GET_SUB_VER _IOR('U', 214, int)
+
+#define CG2900_CHAR_DEV_IOCTL_EVENT_RESET 1
+#define CG2900_CHAR_DEV_IOCTL_EVENT_CLOSED 2
+
+/* Internal type definitions */
+
+/**
+ * enum char_reset_state - Reset state.
+ * @CG2900_CHAR_IDLE: Idle state.
+ * @CG2900_CHAR_RESET: Reset state.
+ */
+enum char_reset_state {
+ CG2900_CHAR_IDLE,
+ CG2900_CHAR_RESET
+};
+
+/**
+ * struct char_dev_user - Stores device information.
+ * @dev: Registered CG2900 Core device.
+ * @miscdev: Registered device struct.
+ * @name: Name of device.
+ * @rx_queue: Data queue.
+ * @rx_wait_queue: Wait queue.
+ * @reset_wait_queue: Reset Wait queue.
+ * @reset_state: Reset state.
+ * @read_mutex: Read mutex.
+ * @write_mutex: Write mutex.
+ * @list: List header for inserting into device list.
+ */
+struct char_dev_user {
+ struct cg2900_device *dev;
+ struct miscdevice *miscdev;
+ char *name;
+ struct sk_buff_head rx_queue;
+ wait_queue_head_t rx_wait_queue;
+ wait_queue_head_t reset_wait_queue;
+ enum char_reset_state reset_state;
+ struct mutex read_mutex;
+ struct mutex write_mutex;
+ struct list_head list;
+};
+
+/**
+ * struct char_info - Stores all current users.
+ * @open_mutex: Open mutex (used for both open and release).
+ * @dev_users: List of char dev users.
+ */
+struct char_info {
+ struct mutex open_mutex;
+ struct list_head dev_users;
+};
+
+/* Internal variable declarations */
+
+/*
+ * char_info - Main information object for char devices.
+ */
+static struct char_info *char_info;
+
+/* ST-Ericsson CG2900 driver callbacks */
+
+/**
+ * char_dev_read_cb() - Handle data received from controller.
+ * @dev: Device receiving data.
+ * @skb: Buffer with data coming from controller.
+ *
+ * The char_dev_read_cb() function handles data received from
STE-CG2900 driver.
+ */
+static void char_dev_read_cb(struct cg2900_device *dev, struct sk_buff *skb)
+{
+ struct char_dev_user *char_dev = (struct char_dev_user *)dev->user_data;
+
+ CG2900_INFO("CharDev: char_dev_read_cb");
+
+ if (!char_dev) {
+ CG2900_ERR("No char dev! Exiting");
+ kfree_skb(skb);
+ return;
+ }
+
+ skb_queue_tail(&char_dev->rx_queue, skb);
+
+ wake_up_interruptible(&char_dev->rx_wait_queue);
+}
+
+/**
+ * char_dev_reset_cb() - Handle reset from controller.
+ * @dev: Device resetting.
+ *
+ * The char_dev_reset_cb() function handles reset from the CG2900 driver.
+ */
+static void char_dev_reset_cb(struct cg2900_device *dev)
+{
+ struct char_dev_user *char_dev = (struct char_dev_user *)dev->user_data;
+
+ CG2900_INFO("CharDev: char_dev_reset_cb");
+
+ if (!char_dev) {
+ CG2900_ERR("char_dev == NULL");
+ return;
+ }
+
+ char_dev->reset_state = CG2900_CHAR_RESET;
+ /*
+ * The device will be freed by CG2900 Core when this function is
+ * finished.
+ */
+ char_dev->dev = NULL;
+
+ wake_up_interruptible(&char_dev->rx_wait_queue);
+ wake_up_interruptible(&char_dev->reset_wait_queue);
+}
+
+/*
+ * struct char_cb - Callback structure for CG2900 user.
+ * @read_cb: Callback function called when data is received from the
+ * CG2900 driver.
+ * @reset_cb: Callback function called when the controller has been reset.
+ */
+static struct cg2900_callbacks char_cb = {
+ .read_cb = char_dev_read_cb,
+ .reset_cb = char_dev_reset_cb
+};
+
+/* File operation functions */
+
+/**
+ * char_dev_open() - Open char device.
+ * @inode: Device driver information.
+ * @filp: Pointer to the file struct.
+ *
+ * The char_dev_open() function opens the char device.
+ *
+ * Returns:
+ * 0 if there is no error.
+ * -EACCES if device was already registered to driver or if registration
+ * failed.
+ */
+static int char_dev_open(struct inode *inode, struct file *filp)
+{
+ int err = 0;
+ int minor;
+ struct char_dev_user *dev = NULL;
+ struct char_dev_user *tmp;
+ struct list_head *cursor;
+
+ mutex_lock(&char_info->open_mutex);
+
+ minor = iminor(inode);
+
+ /* Find the device for this file */
+ list_for_each(cursor, &char_info->dev_users) {
+ tmp = list_entry(cursor, struct char_dev_user, list);
+ if (tmp->miscdev->minor == minor) {
+ dev = tmp;
+ break;
+ }
+ }
+ if (!dev) {
+ CG2900_ERR("Could not identify device in inode");
+ err = -EINVAL;
+ goto error_handling;
+ }
+
+ filp->private_data = dev;
+
+ CG2900_INFO("CharDev: char_dev_open %s", dev->name);
+
+ if (dev->dev) {
+ CG2900_ERR("Device already registered to CG2900 Driver");
+ err = -EACCES;
+ goto error_handling;
+ }
+ /* First initiate wait queues for this device. */
+ init_waitqueue_head(&dev->rx_wait_queue);
+ init_waitqueue_head(&dev->reset_wait_queue);
+
+ dev->reset_state = CG2900_CHAR_IDLE;
+
+ /* Register to CG2900 Driver */
+ dev->dev = cg2900_register_user(dev->name, &char_cb);
+ if (dev->dev)
+ dev->dev->user_data = dev;
+ else {
+ CG2900_ERR("Couldn't register to CG2900 for H:4 channel %s",
+ dev->name);
+ err = -EACCES;
+ }
+
+error_handling:
+ mutex_unlock(&char_info->open_mutex);
+ return err;
+}
+
+/**
+ * char_dev_release() - Release char device.
+ * @inode: Device driver information.
+ * @filp: Pointer to the file struct.
+ *
+ * The char_dev_release() function release the char device.
+ *
+ * Returns:
+ * 0 if there is no error.
+ * -EBADF if NULL pointer was supplied in private data.
+ */
+static int char_dev_release(struct inode *inode, struct file *filp)
+{
+ int err = 0;
+ struct char_dev_user *dev = (struct char_dev_user *)filp->private_data;
+
+ CG2900_INFO("CharDev: char_dev_release");
+
+ if (!dev) {
+ CG2900_ERR("Calling with NULL pointer");
+ return -EBADF;
+ }
+
+ mutex_lock(&char_info->open_mutex);
+ mutex_lock(&dev->read_mutex);
+ mutex_lock(&dev->write_mutex);
+
+ if (dev->reset_state == CG2900_CHAR_IDLE)
+ cg2900_deregister_user(dev->dev);
+
+ dev->dev = NULL;
+ filp->private_data = NULL;
+ wake_up_interruptible(&dev->rx_wait_queue);
+ wake_up_interruptible(&dev->reset_wait_queue);
+
+ mutex_unlock(&dev->write_mutex);
+ mutex_unlock(&dev->read_mutex);
+ mutex_unlock(&char_info->open_mutex);
+
+ return err;
+}
+
+/**
+ * char_dev_read() - Queue and copy buffer to user.
+ * @filp: Pointer to the file struct.
+ * @buf: Received buffer.
+ * @count: Size of buffer.
+ * @f_pos: Position in buffer.
+ *
+ * The char_dev_read() function queues and copy the received buffer to
+ * the user space char device. If no data is available this function
will block.
+ *
+ * Returns:
+ * Bytes successfully read (could be 0).
+ * -EBADF if NULL pointer was supplied in private data.
+ * -EFAULT if copy_to_user fails.
+ * Error codes from wait_event_interruptible.
+ */
+static ssize_t char_dev_read(struct file *filp, char __user *buf, size_t count,
+ loff_t *f_pos)
+{
+ struct char_dev_user *dev = (struct char_dev_user *)filp->private_data;
+ struct sk_buff *skb;
+ int bytes_to_copy;
+ int err = 0;
+
+ CG2900_INFO("CharDev: char_dev_read");
+
+ if (!dev) {
+ CG2900_ERR("Calling with NULL pointer");
+ return -EBADF;
+ }
+ mutex_lock(&dev->read_mutex);
+
+ if (skb_queue_empty(&dev->rx_queue)) {
+ err = wait_event_interruptible(dev->rx_wait_queue,
+ (!(skb_queue_empty(&dev->rx_queue))) ||
+ (CG2900_CHAR_RESET == dev->reset_state) ||
+ (dev->dev == NULL));
+ if (err) {
+ CG2900_ERR("Failed to wait for event");
+ goto error_handling;
+ }
+ }
+
+ if (!dev->dev) {
+ CG2900_DBG("dev is empty - return with negative bytes");
+ err = -EBADF;
+ goto error_handling;
+ }
+
+ skb = skb_dequeue(&dev->rx_queue);
+ if (!skb) {
+ CG2900_DBG("skb queue is empty - return with zero bytes");
+ bytes_to_copy = 0;
+ goto finished;
+ }
+
+ bytes_to_copy = min(count, skb->len);
+
+ err = copy_to_user(buf, skb->data, bytes_to_copy);
+ if (err) {
+ skb_queue_head(&dev->rx_queue, skb);
+ err = -EFAULT;
+ goto error_handling;
+ }
+
+ skb_pull(skb, bytes_to_copy);
+
+ if (skb->len > 0)
+ skb_queue_head(&dev->rx_queue, skb);
+ else
+ kfree_skb(skb);
+
+ goto finished;
+
+error_handling:
+ mutex_unlock(&dev->read_mutex);
+ return (ssize_t)err;
+finished:
+ mutex_unlock(&dev->read_mutex);
+ return bytes_to_copy;
+}
+
+/**
+ * char_dev_write() - Copy buffer from user and write to CG2900 driver.
+ * @filp: Pointer to the file struct.
+ * @buf: Write buffer.
+ * @count: Size of the buffer write.
+ * @f_pos: Position of buffer.
+ *
+ * Returns:
+ * Bytes successfully written (could be 0).
+ * -EBADF if NULL pointer was supplied in private data.
+ * -EFAULT if copy_from_user fails.
+ */
+static ssize_t char_dev_write(struct file *filp, const char __user *buf,
+ size_t count, loff_t *f_pos)
+{
+ struct sk_buff *skb;
+ struct char_dev_user *dev = (struct char_dev_user *)filp->private_data;
+ int err = 0;
+
+ CG2900_INFO("CharDev: char_dev_write");
+
+ if (!dev) {
+ CG2900_ERR("Calling with NULL pointer");
+ return -EBADF;
+ }
+ mutex_lock(&dev->write_mutex);
+
+ skb = cg2900_alloc_skb(count, GFP_ATOMIC);
+ if (!skb) {
+ CG2900_ERR("Couldn't allocate sk_buff with length %d", count);
+ goto error_handling;
+ }
+
+ if (copy_from_user(skb_put(skb, count), buf, count)) {
+ kfree_skb(skb);
+ err = -EFAULT;
+ goto error_handling;
+ }
+
+ err = cg2900_write(dev->dev, skb);
+ if (err) {
+ CG2900_ERR("cg2900_write failed (%d)", err);
+ kfree_skb(skb);
+ goto error_handling;
+ }
+
+ mutex_unlock(&dev->write_mutex);
+ return count;
+
+error_handling:
+ mutex_unlock(&dev->write_mutex);
+ return err;
+}
+
+/**
+ * char_dev_unlocked_ioctl() - Handle IOCTL call to the interface.
+ * @filp: Pointer to the file struct.
+ * @cmd: IOCTL command.
+ * @arg: IOCTL argument.
+ *
+ * Returns:
+ * 0 if there is no error.
+ * -EBADF if NULL pointer was supplied in private data.
+ * -EINVAL if supplied cmd is not supported.
+ * For cmd CG2900_CHAR_DEV_IOCTL_CHECK4RESET 0x01 is returned if device is
+ * reset and 0x02 is returned if device is closed.
+ */
+static long char_dev_unlocked_ioctl(struct file *filp, unsigned int cmd,
+ unsigned long arg)
+{
+ struct char_dev_user *dev = (struct char_dev_user *)filp->private_data;
+ struct cg2900_rev_data rev_data;
+ int err = 0;
+
+ CG2900_INFO("CharDev: char_dev_unlocked_ioctl cmd %d for %s", cmd,
+ dev->name);
+ CG2900_DBG("DIR: %d, TYPE: %d, NR: %d, SIZE: %d",
+ _IOC_DIR(cmd), _IOC_TYPE(cmd), _IOC_NR(cmd),
+ _IOC_SIZE(cmd));
+
+ switch (cmd) {
+ case CG2900_CHAR_DEV_IOCTL_RESET:
+ if (!dev) {
+ err = -EBADF;
+ goto error_handling;
+ }
+ CG2900_INFO("ioctl reset command for device %s", dev->name);
+ err = cg2900_reset(dev->dev);
+ break;
+
+ case CG2900_CHAR_DEV_IOCTL_CHECK4RESET:
+ if (!dev) {
+ CG2900_INFO("ioctl check for reset command for device");
+ /* Return positive value if closed */
+ err = CG2900_CHAR_DEV_IOCTL_EVENT_CLOSED;
+ } else if (dev->reset_state == CG2900_CHAR_RESET) {
+ CG2900_INFO("ioctl check for reset command for device "
+ "%s", dev->name);
+ /* Return positive value if reset */
+ err = CG2900_CHAR_DEV_IOCTL_EVENT_RESET;
+ }
+ break;
+
+ case CG2900_CHAR_DEV_IOCTL_GET_REVISION:
+ CG2900_INFO("ioctl check for local revision info");
+ if (cg2900_get_local_revision(&rev_data)) {
+ CG2900_DBG("Read revision data revision %d "
+ "sub_version %d",
+ rev_data.revision, rev_data.sub_version);
+ err = rev_data.revision;
+ } else {
+ CG2900_DBG("No revision data available");
+ err = -EIO;
+ }
+ break;
+
+ case CG2900_CHAR_DEV_IOCTL_GET_SUB_VER:
+ CG2900_INFO("ioctl check for local sub-version info");
+ if (cg2900_get_local_revision(&rev_data)) {
+ CG2900_DBG("Read revision data revision %d "
+ "sub_version %d",
+ rev_data.revision, rev_data.sub_version);
+ err = rev_data.sub_version;
+ } else {
+ CG2900_DBG("No revision data available");
+ err = -EIO;
+ }
+ break;
+
+ default:
+ CG2900_ERR("Unknown ioctl command %08X", cmd);
+ err = -EINVAL;
+ break;
+ };
+
+error_handling:
+ return err;
+}
+
+/**
+ * char_dev_poll() - Handle POLL call to the interface.
+ * @filp: Pointer to the file struct.
+ * @wait: Poll table supplied to caller.
+ *
+ * Returns:
+ * Mask of current set POLL values
+ */
+static unsigned int char_dev_poll(struct file *filp, poll_table *wait)
+{
+ struct char_dev_user *dev = (struct char_dev_user *)filp->private_data;
+ unsigned int mask = 0;
+
+ if (!dev) {
+ CG2900_DBG("Device not open");
+ return POLLERR | POLLRDHUP;
+ }
+
+ poll_wait(filp, &dev->reset_wait_queue, wait);
+ poll_wait(filp, &dev->rx_wait_queue, wait);
+
+ if (!dev->dev)
+ mask |= POLLERR | POLLRDHUP;
+ else
+ mask |= POLLOUT; /* We can TX unless there is an error */
+
+ if (!(skb_queue_empty(&dev->rx_queue)))
+ mask |= POLLIN | POLLRDNORM;
+
+ if (CG2900_CHAR_RESET == dev->reset_state)
+ mask |= POLLPRI;
+
+ return mask;
+}
+
+/*
+ * struct char_dev_fops - Char devices file operations.
+ * @read: Function that reads from the char device.
+ * @write: Function that writes to the char device.
+ * @unlocked_ioctl: Function that performs IO operations with
+ * the char device.
+ * @poll: Function that checks if there are possible operations
+ * with the char device.
+ * @open: Function that opens the char device.
+ * @release: Function that release the char device.
+ */
+static const struct file_operations char_dev_fops = {
+ .read = char_dev_read,
+ .write = char_dev_write,
+ .unlocked_ioctl = char_dev_unlocked_ioctl,
+ .poll = char_dev_poll,
+ .open = char_dev_open,
+ .release = char_dev_release
+};
+
+/**
+ * setup_dev() - Set up the char device structure for device.
+ * @parent: Parent device pointer.
+ * @name: Name of registered device.
+ *
+ * The setup_dev() function sets up the char_dev structure for this device.
+ *
+ * Returns:
+ * 0 if there is no error.
+ * -EINVAL if NULL pointer has been supplied.
+ * Error codes from cdev_add and device_create.
+ */
+static int setup_dev(struct device *parent, char *name)
+{
+ int err = 0;
+ struct char_dev_user *dev_usr;
+
+ CG2900_INFO("CharDev: setup_dev");
+
+ dev_usr = kzalloc(sizeof(*dev_usr), GFP_KERNEL);
+ if (!dev_usr) {
+ CG2900_ERR("Couldn't allocate dev_usr");
+ return -ENOMEM;
+ }
+
+ /* Store device name */
+ dev_usr->name = name;
+
+ dev_usr->miscdev = kzalloc(sizeof(*(dev_usr->miscdev)),
+ GFP_KERNEL);
+ if (!dev_usr->miscdev) {
+ CG2900_ERR("Couldn't allocate char_dev");
+ err = -ENOMEM;
+ goto err_free_usr;
+ }
+
+ /* Prepare miscdevice struct before registering the device */
+ dev_usr->miscdev->minor = MISC_DYNAMIC_MINOR;
+ dev_usr->miscdev->name = name;
+ dev_usr->miscdev->fops = &char_dev_fops;
+ dev_usr->miscdev->parent = parent;
+
+ err = misc_register(dev_usr->miscdev);
+ if (err) {
+ CG2900_ERR("Error %d registering misc dev!", err);
+ goto err_free_dev;
+ }
+
+ CG2900_INFO("Added char device %s with major 0x%X and minor 0x%X",
+ name, MAJOR(dev_usr->miscdev->this_device->devt),
+ MINOR(dev_usr->miscdev->this_device->devt));
+
+ mutex_init(&dev_usr->read_mutex);
+ mutex_init(&dev_usr->write_mutex);
+
+ skb_queue_head_init(&dev_usr->rx_queue);
+
+ list_add_tail(&dev_usr->list, &char_info->dev_users);
+ return 0;
+
+err_free_dev:
+ kfree(dev_usr->miscdev);
+ dev_usr->miscdev = NULL;
+err_free_usr:
+ kfree(dev_usr);
+ return err;
+}
+
+/**
+ * remove_dev() - Remove char device structure for device.
+ * @dev_usr: Char device user.
+ *
+ * The remove_dev() function releases the char_dev structure for this device.
+ */
+static void remove_dev(struct char_dev_user *dev_usr)
+{
+ CG2900_INFO("CharDev: remove_dev");
+
+ if (!dev_usr)
+ return;
+
+ skb_queue_purge(&dev_usr->rx_queue);
+
+ mutex_destroy(&dev_usr->read_mutex);
+ mutex_destroy(&dev_usr->write_mutex);
+
+ /* Remove device node in file system. */
+ misc_deregister(dev_usr->miscdev);
+ kfree(dev_usr->miscdev);
+ dev_usr->miscdev = NULL;
+
+ kfree(dev_usr);
+}
+
+/* External functions */
+
+void cg2900_char_devices_init(struct miscdevice *dev)
+{
+ CG2900_INFO("cg2900_char_devices_init");
+
+ if (!dev) {
+ CG2900_ERR("NULL supplied for dev");
+ return;
+ }
+
+ if (char_info) {
+ CG2900_ERR("Char devices already initiated");
+ return;
+ }
+
+ /* Initialize private data. */
+ char_info = kzalloc(sizeof(*char_info), GFP_ATOMIC);
+ if (!char_info) {
+ CG2900_ERR("Could not alloc char_info struct.");
+ return;
+ }
+
+ mutex_init(&char_info->open_mutex);
+ INIT_LIST_HEAD(&char_info->dev_users);
+
+ setup_dev(dev->this_device, CG2900_BT_CMD);
+ setup_dev(dev->this_device, CG2900_BT_ACL);
+ setup_dev(dev->this_device, CG2900_BT_EVT);
+ setup_dev(dev->this_device, CG2900_FM_RADIO);
+ setup_dev(dev->this_device, CG2900_GNSS);
+ setup_dev(dev->this_device, CG2900_DEBUG);
+ setup_dev(dev->this_device, CG2900_STE_TOOLS);
+ setup_dev(dev->this_device, CG2900_HCI_LOGGER);
+ setup_dev(dev->this_device, CG2900_US_CTRL);
+ setup_dev(dev->this_device, CG2900_BT_AUDIO);
+ setup_dev(dev->this_device, CG2900_FM_RADIO_AUDIO);
+ setup_dev(dev->this_device, CG2900_CORE);
+}
+
+void cg2900_char_devices_exit(void)
+{
+ struct list_head *cursor, *next;
+ struct char_dev_user *tmp;
+
+ CG2900_INFO("cg2900_char_devices_exit");
+
+ if (!char_info)
+ return;
+
+ list_for_each_safe(cursor, next, &char_info->dev_users) {
+ tmp = list_entry(cursor, struct char_dev_user, list);
+ list_del(cursor);
+ remove_dev(tmp);
+ }
+
+ mutex_destroy(&char_info->open_mutex);
+
+ kfree(char_info);
+ char_info = NULL;
+}
+
+MODULE_AUTHOR("Henrik Possung ST-Ericsson");
+MODULE_AUTHOR("Par-Gunnar Hjalmdahl ST-Ericsson");
+MODULE_LICENSE("GPL v2");
+MODULE_DESCRIPTION("ST-Ericsson CG2900 Char Devices Driver");
diff --git a/drivers/mfd/cg2900/cg2900_char_devices.h
b/drivers/mfd/cg2900/cg2900_char_devices.h
new file mode 100644
index 0000000..65d2b7f
--- /dev/null
+++ b/drivers/mfd/cg2900/cg2900_char_devices.h
@@ -0,0 +1,36 @@
+/*
+ * drivers/mfd/cg2900/cg2900_char_devices.h
+ *
+ * Copyright (C) ST-Ericsson SA 2010
+ * Authors:
+ * Par-Gunnar Hjalmdahl (par-gunnar.p.hjalmdahl@...ricsson.com) for
ST-Ericsson.
+ * Henrik Possung (henrik.possung@...ricsson.com) for ST-Ericsson.
+ * Josef Kindberg (josef.kindberg@...ricsson.com) for ST-Ericsson.
+ * Dariusz Szymszak (dariusz.xd.szymczak@...ricsson.com) for ST-Ericsson.
+ * Kjell Andersson (kjell.k.andersson@...ricsson.com) for ST-Ericsson.
+ * License terms: GNU General Public License (GPL), version 2
+ *
+ * Linux Bluetooth HCI H:4 Driver for ST-Ericsson connectivity controller.
+ */
+
+#ifndef _CG2900_CHAR_DEVICES_H_
+#define _CG2900_CHAR_DEVICES_H_
+
+#include <linux/miscdevice.h>
+
+/**
+ * cg2900_char_devices_init() - Initialize char device module.
+ * @parent: Parent device for the driver.
+ *
+ * Returns:
+ * 0 if success.
+ * Negative value upon error.
+ */
+extern int cg2900_char_devices_init(struct miscdevice *parent);
+
+/**
+ * cg2900_char_devices_exit() - Release the char device module.
+ */
+extern void cg2900_char_devices_exit(void);
+
+#endif /* _CG2900_CHAR_DEVICES_H_ */
diff --git a/drivers/mfd/cg2900/cg2900_core.c b/drivers/mfd/cg2900/cg2900_core.c
new file mode 100644
index 0000000..8c26202
--- /dev/null
+++ b/drivers/mfd/cg2900/cg2900_core.c
@@ -0,0 +1,2287 @@
+/*
+ * drivers/mfd/cg2900/cg2900_core.c
+ *
+ * Copyright (C) ST-Ericsson SA 2010
+ * Authors:
+ * Par-Gunnar Hjalmdahl (par-gunnar.p.hjalmdahl@...ricsson.com) for
ST-Ericsson.
+ * Henrik Possung (henrik.possung@...ricsson.com) for ST-Ericsson.
+ * Josef Kindberg (josef.kindberg@...ricsson.com) for ST-Ericsson.
+ * Dariusz Szymszak (dariusz.xd.szymczak@...ricsson.com) for ST-Ericsson.
+ * Kjell Andersson (kjell.k.andersson@...ricsson.com) for ST-Ericsson.
+ * License terms: GNU General Public License (GPL), version 2
+ *
+ * Linux Bluetooth HCI H:4 Driver for ST-Ericsson CG2900 GPS/BT/FM controller.
+ */
+
+#include <linux/module.h>
+#include <linux/workqueue.h>
+#include <linux/wait.h>
+#include <linux/sched.h>
+#include <linux/timer.h>
+#include <linux/skbuff.h>
+#include <linux/gfp.h>
+#include <linux/stat.h>
+#include <linux/types.h>
+#include <linux/time.h>
+#include <linux/jiffies.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/firmware.h>
+#include <linux/mutex.h>
+#include <linux/list.h>
+#include <linux/miscdevice.h>
+#include <linux/fs.h>
+#include <linux/poll.h>
+#include <asm/byteorder.h>
+#include <net/bluetooth/bluetooth.h>
+#include <net/bluetooth/hci.h>
+
+#include <linux/mfd/cg2900.h>
+#include <mach/cg2900_devices.h>
+#include "cg2900_core.h"
+#include "cg2900_char_devices.h"
+#include "cg2900_debug.h"
+#include "hci_defines.h"
+
+/* Device names */
+#define CG2900_CDEV_NAME "cg2900_core_test"
+#define CG2900_CLASS_NAME "cg2900_class"
+#define CG2900_DEVICE_NAME "cg2900_driver"
+#define CORE_WQ_NAME "cg2900_core_wq"
+
+#define SET_MAIN_STATE(__core_new_state) \
+ CG2900_SET_STATE("main_state", core_info->main_state, \
+ __core_new_state)
+#define SET_BOOT_STATE(__core_new_state) \
+ CG2900_SET_STATE("boot_state", core_info->boot_state, __core_new_state)
+#define SET_TRANSPORT_STATE(__core_new_state) \
+ CG2900_SET_STATE("transport_state", core_info->transport_state, \
+ __core_new_state)
+
+#define LOGGER_DIRECTION_TX 0
+#define LOGGER_DIRECTION_RX 1
+
+/* Number of bytes to reserve at start of sk_buffer when receiving packet */
+#define RX_SKB_RESERVE 8
+
+/*
+ * Timeout values
+ */
+#define CHIP_STARTUP_TIMEOUT (15000) /* ms */
+#define CHIP_SHUTDOWN_TIMEOUT (15000) /* ms */
+#define LINE_TOGGLE_DETECT_TIMEOUT (50) /* ms */
+#define CHIP_READY_TIMEOUT (100) /* ms */
+#define REVISION_READOUT_TIMEOUT (500) /* ms */
+
+/*
+ * We can have up to 32 char devs with current bit mask and we also have
+ * the parent device here in the transport so that is 33 devices in total.
+ */
+#define MAX_NBR_OF_DEVS 33
+
+/* Default H4 channels which may change depending on connected controller */
+#define HCI_FM_RADIO_H4_CHANNEL 0x08
+#define HCI_GNSS_H4_CHANNEL 0x09
+
+/*
+ * Internal type definitions
+ */
+
+/**
+ * enum main_state - Main-state for CG2900 Core.
+ * @CORE_INITIALIZING: CG2900 Core initializing.
+ * @CORE_IDLE: No user registered to CG2900 Core.
+ * @CORE_BOOTING: CG2900 Core booting after first user is registered.
+ * @CORE_CLOSING: CG2900 Core closing after last user has deregistered.
+ * @CORE_RESETING: CG2900 Core reset requested.
+ * @CORE_ACTIVE: CG2900 Core up and running with at least one user.
+ */
+enum main_state {
+ CORE_INITIALIZING,
+ CORE_IDLE,
+ CORE_BOOTING,
+ CORE_CLOSING,
+ CORE_RESETING,
+ CORE_ACTIVE
+};
+
+/**
+ * enum boot_state - BOOT-state for CG2900 Core.
+ * @BOOT_NOT_STARTED: Boot has not yet started.
+ * @BOOT_READ_LOCAL_VERSION_INFORMATION: ReadLocalVersionInformation
+ * command has been sent.
+ * @BOOT_READY: CG2900 Core boot is ready.
+ * @BOOT_FAILED: CG2900 Core boot failed.
+ */
+enum boot_state {
+ BOOT_NOT_STARTED,
+ BOOT_READ_LOCAL_VERSION_INFORMATION,
+ BOOT_READY,
+ BOOT_FAILED
+};
+
+/**
+ * enum transport_state - State for the CG2900 transport.
+ * @TRANS_INITIALIZING: Transport initializing.
+ * @TRANS_OPENED: Transport is opened (data can be sent).
+ * @TRANS_CLOSED: Transport is closed (data cannot be sent).
+ */
+enum transport_state {
+ TRANS_INITIALIZING,
+ TRANS_OPENED,
+ TRANS_CLOSED
+};
+
+/**
+ * struct cg2900_users - Stores all current users of CG2900 Core.
+ * @bt_cmd: BT command channel user.
+ * @bt_acl: BT ACL channel user.
+ * @bt_evt: BT event channel user.
+ * @fm_radio: FM radio channel user.
+ * @gnss GNSS: GNSS channel user.
+ * @debug Debug: Internal debug channel user.
+ * @ste_tools: ST-E tools channel user.
+ * @hci_logger: HCI logger channel user.
+ * @us_ctrl: User space control channel user.
+ * @bt_audio: BT audio command channel user.
+ * @fm_radio_audio: FM audio command channel user.
+ * @core: Core command channel user.
+ * @nbr_of_users: Number of users currently registered (not including
+ * the HCI logger).
+ */
+struct cg2900_users {
+ struct cg2900_device *bt_cmd;
+ struct cg2900_device *bt_acl;
+ struct cg2900_device *bt_evt;
+ struct cg2900_device *fm_radio;
+ struct cg2900_device *gnss;
+ struct cg2900_device *debug;
+ struct cg2900_device *ste_tools;
+ struct cg2900_device *hci_logger;
+ struct cg2900_device *us_ctrl;
+ struct cg2900_device *bt_audio;
+ struct cg2900_device *fm_radio_audio;
+ struct cg2900_device *core;
+ unsigned int nbr_of_users;
+};
+
+/**
+ * struct local_chip_info - Stores local controller info.
+ * @version_set: true if version data is valid.
+ * @hci_version: HCI version of local controller.
+ * @hci_revision: HCI revision of local controller.
+ * @lmp_pal_version: LMP/PAL version of local controller.
+ * @manufacturer: Manufacturer of local controller.
+ * @lmp_pal_subversion: LMP/PAL sub-version of local controller.
+ *
+ * According to Bluetooth HCI Read Local Version Information command.
+ */
+struct local_chip_info {
+ bool version_set;
+ u8 hci_version;
+ u16 hci_revision;
+ u8 lmp_pal_version;
+ u16 manufacturer;
+ u16 lmp_pal_subversion;
+};
+
+/**
+ * struct chip_handler_item - Structure to store chip handler cb.
+ * @list: list_head struct.
+ * @cb: Chip handler callback struct.
+ */
+struct chip_handler_item {
+ struct list_head list;
+ struct cg2900_id_callbacks cb;
+};
+
+/**
+ * struct cg2900_work_struct - Work structure for CG2900 Core module.
+ * @work: Work structure.
+ * @data: Pointer to private data.
+ *
+ * This structure is used to pack work for work queue.
+ */
+struct cg2900_work_struct{
+ struct work_struct work;
+ void *data;
+};
+
+/**
+ * struct test_char_dev_info - Stores device information.
+ * @test_miscdev: Registered Misc Device.
+ * @rx_queue: RX data queue.
+ */
+struct test_char_dev_info {
+ struct miscdevice test_miscdev;
+ struct sk_buff_head rx_queue;
+};
+
+/**
+ * struct trans_info - Stores transport information.
+ * @dev: Transport device.
+ * @cb: Transport cb.
+ */
+struct trans_info {
+ struct cg2900_trans_dev dev;
+ struct cg2900_trans_callbacks cb;
+};
+
+/**
+ * struct core_info - Main info structure for CG2900 Core.
+ * @users: Stores all users of CG2900 Core.
+ * @local_chip_info: Stores information of local controller.
+ * @main_state: Current Main-state of CG2900 Core.
+ * @boot_state: Current BOOT-state of CG2900 Core.
+ * @transport_state: Current TRANSPORT-state of CG2900 Core.
+ * @wq: CG2900 Core workqueue.
+ * @hci_logger_config: Stores HCI logger configuration.
+ * @dev: Device structure for STE Connectivity driver.
+ * @chip_dev: Device structure for chip driver.
+ * @h4_channels: HCI H:4 channel used by this device.
+ * @test_char_dev: Stores information of test char dev.
+ * @trans_info: Stores information about current transport.
+ */
+struct core_info {
+ struct cg2900_users users;
+ struct local_chip_info local_chip_info;
+ enum main_state main_state;
+ enum boot_state boot_state;
+ enum transport_state transport_state;
+ struct workqueue_struct *wq;
+ struct cg2900_hci_logger_config hci_logger_config;
+ struct miscdevice *dev;
+ struct cg2900_chip_dev chip_dev;
+ struct cg2900_h4_channels h4_channels;
+ struct test_char_dev_info *test_char_dev;
+ struct trans_info *trans_info;
+};
+
+/*
+ * Internal variable declarations
+ */
+
+/*
+ * core_info - Main information object for CG2900 Core.
+ */
+static struct core_info *core_info;
+
+/* Module parameters */
+int cg2900_debug_level = CG2900_DEFAULT_DEBUG_LEVEL;
+EXPORT_SYMBOL(cg2900_debug_level);
+
+u8 bd_address[] = {0x00, 0xBE, 0xAD, 0xDE, 0x80, 0x00};
+EXPORT_SYMBOL(bd_address);
+int bd_addr_count = BT_BDADDR_SIZE;
+
+/* Setting default values to ST-E CG2900 */
+int default_manufacturer = 0x30;
+EXPORT_SYMBOL(default_manufacturer);
+int default_hci_revision = 0x0700;
+EXPORT_SYMBOL(default_hci_revision);
+int default_sub_version = 0x0011;
+EXPORT_SYMBOL(default_sub_version);
+
+static int sleep_timeout_ms;
+
+/*
+ * chip_handlers - List of the register handlers for different chips.
+ */
+LIST_HEAD(chip_handlers);
+
+/*
+ * main_wait_queue - Main Wait Queue in CG2900 Core.
+ */
+static DECLARE_WAIT_QUEUE_HEAD(main_wait_queue);
+
+/*
+ * main_wait_queue - Char device Wait Queue in CG2900 Core.
+ */
+static DECLARE_WAIT_QUEUE_HEAD(char_wait_queue);
+
+/*
+ * Internal functions
+ */
+
+/**
+ * free_user_dev - Frees user device and also sets it to NULL to inform caller.
+ * @dev: Pointer to user device.
+ */
+static void free_user_dev(struct cg2900_device **dev)
+{
+ if (*dev) {
+ kfree((*dev)->cb);
+ kfree(*dev);
+ *dev = NULL;
+ }
+}
+
+/**
+ * handle_reset_of_user - Calls the reset callback and frees the device.
+ * @dev: Pointer to CG2900 device.
+ */
+static void handle_reset_of_user(struct cg2900_device **dev)
+{
+ if (*dev) {
+ if ((*dev)->cb->reset_cb)
+ (*dev)->cb->reset_cb((*dev));
+ free_user_dev(dev);
+ }
+}
+
+/**
+ * transmit_skb_to_chip() - Transmit buffer to the transport.
+ * @skb: Data packet.
+ * @use_logger: True if HCI logger shall be used, false otherwise.
+ *
+ * The transmit_skb_to_chip() function transmit buffer to the transport.
+ * If enabled, copy the transmitted data to the HCI logger as well.
+ */
+static void transmit_skb_to_chip(struct sk_buff *skb, bool use_logger)
+{
+ int err;
+ struct sk_buff *skb_log;
+ struct trans_info *trans_info = core_info->trans_info;
+ struct cg2900_device *logger;
+
+ CG2900_DBG_DATA("transmit_skb_to_chip %d bytes. First byte 0x%02X",
+ skb->len, *(skb->data));
+
+ if (TRANS_CLOSED == core_info->transport_state) {
+ CG2900_ERR("Trying to write on a closed channel");
+ kfree_skb(skb);
+ return;
+ }
+
+ /*
+ * If HCI logging is enabled for this channel, copy the data to
+ * the HCI logging output.
+ */
+ logger = core_info->users.hci_logger;
+ if (!use_logger || !logger)
+ goto transmit;
+
+ /*
+ * Alloc a new sk_buff and copy the data into it. Then send it to
+ * the HCI logger.
+ */
+ skb_log = alloc_skb(skb->len + 1, GFP_ATOMIC);
+ if (!skb_log) {
+ CG2900_ERR("Couldn't allocate skb_log");
+ goto transmit;
+ }
+
+ memcpy(skb_put(skb_log, skb->len), skb->data, skb->len);
+ skb_log->data[0] = (u8) LOGGER_DIRECTION_TX;
+
+ if (logger->cb->read_cb)
+ logger->cb->read_cb(logger, skb_log);
+
+transmit:
+ CG2900_DBG_DATA_CONTENT("Length: %d Data: %02X %02X %02X %02X %02X "
+ "%02X %02X %02X %02X %02X %02X %02X",
+ skb->len,
+ skb->data[0], skb->data[1], skb->data[2],
+ skb->data[3], skb->data[4], skb->data[5],
+ skb->data[6], skb->data[7], skb->data[8],
+ skb->data[9], skb->data[10], skb->data[11]);
+
+ if (trans_info && trans_info->cb.write) {
+ err = trans_info->cb.write(&trans_info->dev, skb);
+ if (err)
+ CG2900_ERR("Transport write failed (%d)", err);
+ } else {
+ CG2900_ERR("No way to write to chip");
+ err = -EPERM;
+ }
+
+ if (err)
+ kfree_skb(skb);
+}
+
+/**
+ * create_and_send_bt_cmd() - Copy and send sk_buffer.
+ * @data: Data to send.
+ * @length: Length in bytes of data.
+ *
+ * The create_and_send_bt_cmd() function allocates sk_buffer, copy supplied
+ * data to it, and send the sk_buffer to the transport.
+ */
+static void create_and_send_bt_cmd(void *data, int length)
+{
+ struct sk_buff *skb;
+
+ skb = cg2900_alloc_skb(length, GFP_ATOMIC);
+ if (!skb) {
+ CG2900_ERR("Couldn't allocate sk_buff with length %d",
+ length);
+ return;
+ }
+
+ memcpy(skb_put(skb, length), data, length);
+ skb_push(skb, CG2900_SKB_RESERVE);
+ skb->data[0] = HCI_BT_CMD_H4_CHANNEL;
+
+ transmit_skb_to_chip(skb, core_info->hci_logger_config.bt_cmd_enable);
+}
+
+/**
+ * chip_not_detected() - Called when it is not possible to detect the chip.
+ *
+ * This function sets chip information to default values if it is not possible
+ * to read out information from the chip. This is common when running module
+ * tests.
+ */
+static void chip_not_detected(void)
+{
+ struct list_head *cursor;
+ struct chip_handler_item *tmp;
+
+ CG2900_ERR("Could not read out revision from the chip. This is "
+ "typical when running stubbed CG2900.\n"
+ "Switching to default value:\n"
+ "\tman 0x%04X\n"
+ "\trev 0x%04X\n"
+ "\tsub 0x%04X",
+ default_manufacturer,
+ default_hci_revision,
+ default_sub_version);
+
+ core_info->chip_dev.chip.manufacturer = default_manufacturer;
+ core_info->chip_dev.chip.hci_revision = default_hci_revision;
+ core_info->chip_dev.chip.hci_sub_version = default_sub_version;
+
+ memset(&(core_info->chip_dev.cb), 0, sizeof(core_info->chip_dev.cb));
+
+ /* Find the handler for our default chip */
+ list_for_each(cursor, &chip_handlers) {
+ tmp = list_entry(cursor, struct chip_handler_item, list);
+ if (tmp->cb.check_chip_support(&(core_info->chip_dev))) {
+ CG2900_INFO("Chip handler found");
+ SET_BOOT_STATE(BOOT_READY);
+ break;
+ }
+ }
+}
+
+/**
+ * enable_hci_logger() - Enable HCI logger for each device.
+ * @skb: Received sk buffer.
+ *
+ * The enable_hci_logger() change HCI logger configuration for all registered
+ * devices.
+ *
+ * Returns:
+ * 0 if there is no error.
+ * -EACCES if bad structure was supplied.
+ */
+static int enable_hci_logger(struct sk_buff *skb)
+{
+ struct cg2900_users *users;
+ struct cg2900_hci_logger_config *config;
+
+ if (skb->len != sizeof(*config)) {
+ CG2900_ERR("Trying to configure HCI logger with bad structure");
+ return -EACCES;
+ }
+
+ users = &(core_info->users);
+ config = &(core_info->hci_logger_config);
+
+ /* First store the logger config */
+ memcpy(config, skb->data, sizeof(*config));
+
+ /* Then go through all devices and set the right settings */
+ if (users->bt_cmd)
+ users->bt_cmd->logger_enabled = config->bt_cmd_enable;
+ if (users->bt_audio)
+ users->bt_audio->logger_enabled = config->bt_audio_enable;
+ if (users->bt_acl)
+ users->bt_acl->logger_enabled = config->bt_acl_enable;
+ if (users->bt_evt)
+ users->bt_evt->logger_enabled = config->bt_evt_enable;
+ if (users->fm_radio)
+ users->fm_radio->logger_enabled = config->fm_radio_enable;
+ if (users->fm_radio_audio)
+ users->fm_radio_audio->logger_enabled =
+ config->fm_radio_audio_enable;
+ if (users->gnss)
+ users->gnss->logger_enabled = config->gnss_enable;
+
+ kfree_skb(skb);
+ return 0;
+}
+
+/**
+ * find_bt_audio_user() - Check if data packet is an audio related packet.
+ * @h4_channel: H4 channel.
+ * @dev: Stored CG2900 device.
+ * @skb: skb with received packet.
+ * Returns:
+ * 0 - if no error occurred.
+ * -ENXIO - if cg2900_device not found.
+ */
+static int find_bt_audio_user(int h4_channel, struct cg2900_device **dev,
+ const struct sk_buff * const skb)
+{
+ if (core_info->chip_dev.cb.is_bt_audio_user &&
+ core_info->chip_dev.cb.is_bt_audio_user(h4_channel, skb)) {
+ *dev = core_info->users.bt_audio;
+ if (!(*dev)) {
+ CG2900_ERR("H:4 channel not registered in core_info: "
+ "0x%X", h4_channel);
+ return -ENXIO;
+ }
+ }
+ return 0;
+}
+
+/**
+ * find_fm_audio_user() - Check if data packet is an audio related packet.
+ * @h4_channel: H4 channel.
+ * @dev: Stored CG2900 device.
+ * @skb: skb with received packet.
+ * Returns:
+ * 0 if no error occurred.
+ * -ENXIO if cg2900_device not found.
+ */
+static int find_fm_audio_user(int h4_channel, struct cg2900_device **dev,
+ const struct sk_buff * const skb)
+{
+ if (core_info->chip_dev.cb.is_fm_audio_user &&
+ core_info->chip_dev.cb.is_fm_audio_user(h4_channel, skb)) {
+ *dev = core_info->users.fm_radio_audio;
+ if (!(*dev)) {
+ CG2900_ERR("H:4 channel not registered in core_info: "
+ "0x%X", h4_channel);
+ return -ENXIO;
+ }
+ }
+ return 0;
+}
+
+/**
+ * find_h4_user() - Get H4 user based on supplied H4 channel.
+ * @h4_channel: H4 channel.
+ * @dev: Stored CG2900 device.
+ * @skb: (optional) skb with received packet. Set to NULL if NA.
+ *
+ * Returns:
+ * 0 if there is no error.
+ * -EINVAL if bad channel is supplied or no user was found.
+ * -ENXIO if channel is audio channel but not registered with CG2900.
+ */
+static int find_h4_user(int h4_channel, struct cg2900_device **dev,
+ const struct sk_buff * const skb)
+{
+ int err = 0;
+ struct cg2900_users *users = &(core_info->users);
+ struct cg2900_h4_channels *chan = &(core_info->h4_channels);
+
+ if (h4_channel == chan->bt_cmd_channel) {
+ *dev = users->bt_cmd;
+ } else if (h4_channel == chan->bt_acl_channel) {
+ *dev = users->bt_acl;
+ } else if (h4_channel == chan->bt_evt_channel) {
+ *dev = users->bt_evt;
+ /* Check if it's event generated by previously sent audio user
+ * command. If so then that event should be dispatched to audio
+ * user*/
+ err = find_bt_audio_user(h4_channel, dev, skb);
+ } else if (h4_channel == chan->gnss_channel) {
+ *dev = users->gnss;
+ } else if (h4_channel == chan->fm_radio_channel) {
+ *dev = users->fm_radio;
+ /* Check if it's an event generated by previously sent audio
+ * user command. If so then that event should be dispatched to
+ * audio user */
+ err = find_fm_audio_user(h4_channel, dev, skb);
+ } else if (h4_channel == chan->debug_channel) {
+ *dev = users->debug;
+ } else if (h4_channel == chan->ste_tools_channel) {
+ *dev = users->ste_tools;
+ } else if (h4_channel == chan->hci_logger_channel) {
+ *dev = users->hci_logger;
+ } else if (h4_channel == chan->us_ctrl_channel) {
+ *dev = users->us_ctrl;
+ } else if (h4_channel == chan->core_channel) {
+ *dev = users->core;
+ } else {
+ *dev = NULL;
+ CG2900_ERR("Bad H:4 channel supplied: 0x%X", h4_channel);
+ return -EINVAL;
+ }
+
+ return err;
+}
+
+/**
+ * add_h4_user() - Add H4 user to user storage based on supplied H4 channel.
+ * @dev: Stored CG2900 device.
+ * @name: Device name to identify different devices that are using
+ * the same H4 channel.
+ *
+ * Returns:
+ * 0 if there is no error.
+ * -EINVAL if NULL pointer or bad channel is supplied.
+ * -EBUSY if there already is a user for supplied channel.
+ */
+static int add_h4_user(struct cg2900_device *dev, const char * const name)
+{
+ int err = 0;
+ struct cg2900_users *users = &(core_info->users);
+ struct cg2900_hci_logger_config *config =
+ &(core_info->hci_logger_config);
+ struct cg2900_h4_channels *chan = &(core_info->h4_channels);
+
+ if (!dev) {
+ CG2900_ERR("NULL device supplied");
+ return -EINVAL;
+ }
+
+ if (dev->h4_channel == chan->bt_cmd_channel) {
+ if (!users->bt_cmd &&
+ 0 == strncmp(name, CG2900_BT_CMD, CG2900_MAX_NAME_SIZE)) {
+ users->bt_cmd = dev;
+ users->bt_cmd->logger_enabled = config->bt_cmd_enable;
+ (users->nbr_of_users)++;
+ } else if (!users->bt_audio &&
+ 0 == strncmp(name, CG2900_BT_AUDIO,
+ CG2900_MAX_NAME_SIZE)) {
+ users->bt_audio = dev;
+ users->bt_audio->logger_enabled =
+ config->bt_audio_enable;
+ (users->nbr_of_users)++;
+ } else {
+ err = -EBUSY;
+ CG2900_ERR("name %s bt_cmd 0x%X bt_audio 0x%X",
+ name, (int)users->bt_cmd,
+ (int)users->bt_audio);
+ }
+ } else if (dev->h4_channel == chan->bt_acl_channel) {
+ if (!users->bt_acl) {
+ users->bt_acl = dev;
+ users->bt_acl->logger_enabled = config->bt_acl_enable;
+ (users->nbr_of_users)++;
+ } else {
+ err = -EBUSY;
+ }
+ } else if (dev->h4_channel == chan->bt_evt_channel) {
+ if (!users->bt_evt) {
+ users->bt_evt = dev;
+ users->bt_evt->logger_enabled = config->bt_evt_enable;
+ (users->nbr_of_users)++;
+ } else {
+ err = -EBUSY;
+ }
+ } else if (dev->h4_channel == chan->gnss_channel) {
+ if (!users->gnss) {
+ users->gnss = dev;
+ users->gnss->logger_enabled = config->gnss_enable;
+ (users->nbr_of_users)++;
+ } else {
+ err = -EBUSY;
+ }
+ } else if (dev->h4_channel == chan->fm_radio_channel) {
+ if (!users->fm_radio &&
+ 0 == strncmp(name, CG2900_FM_RADIO,
+ CG2900_MAX_NAME_SIZE)) {
+ users->fm_radio = dev;
+ users->fm_radio->logger_enabled =
+ config->fm_radio_enable;
+ (users->nbr_of_users)++;
+ } else if (!users->fm_radio_audio &&
+ 0 == strncmp(name, CG2900_FM_RADIO_AUDIO,
+ CG2900_MAX_NAME_SIZE)) {
+ users->fm_radio_audio = dev;
+ users->fm_radio_audio->logger_enabled =
+ config->fm_radio_audio_enable;
+ (users->nbr_of_users)++;
+ } else {
+ err = -EBUSY;
+ }
+ } else if (dev->h4_channel == chan->debug_channel) {
+ if (!users->debug)
+ users->debug = dev;
+ else
+ err = -EBUSY;
+ } else if (dev->h4_channel == chan->ste_tools_channel) {
+ if (!users->ste_tools)
+ users->ste_tools = dev;
+ else
+ err = -EBUSY;
+ } else if (dev->h4_channel == chan->hci_logger_channel) {
+ if (!users->hci_logger)
+ users->hci_logger = dev;
+ else
+ err = -EBUSY;
+ } else if (dev->h4_channel == chan->us_ctrl_channel) {
+ if (!users->us_ctrl)
+ users->us_ctrl = dev;
+ else
+ err = -EBUSY;
+ } else if (dev->h4_channel == chan->core_channel) {
+ if (!users->core) {
+ (users->nbr_of_users)++;
+ users->core = dev;
+ } else {
+ err = -EBUSY;
+ }
+ } else {
+ err = -EINVAL;
+ CG2900_ERR("Bad H:4 channel supplied: 0x%X", dev->h4_channel);
+ }
+
+ if (err)
+ CG2900_ERR("H:4 channel 0x%X, not registered (%d)",
+ dev->h4_channel, err);
+
+ return err;
+}
+
+/**
+ * remove_h4_user() - Remove H4 user from user storage.
+ * @dev: Stored CG2900 device.
+ *
+ * Returns:
+ * 0 if there is no error.
+ * -EINVAL if NULL pointer is supplied, bad channel is supplied, or if there
+ * is no user for supplied channel.
+ */
+static int remove_h4_user(struct cg2900_device **dev)
+{
+ int err = 0;
+ struct cg2900_users *users = &(core_info->users);
+ struct cg2900_h4_channels *chan = &(core_info->h4_channels);
+ struct cg2900_chip_callbacks *cb = &(core_info->chip_dev.cb);
+
+ if (!dev || !(*dev)) {
+ CG2900_ERR("NULL device supplied");
+ return -EINVAL;
+ }
+
+ if ((*dev)->h4_channel == chan->bt_cmd_channel) {
+ CG2900_DBG("bt_cmd 0x%X bt_audio 0x%X dev 0x%X",
+ (int)users->bt_cmd,
+ (int)users->bt_audio, (int)*dev);
+
+ if (*dev == users->bt_cmd) {
+ users->bt_cmd = NULL;
+ (users->nbr_of_users)--;
+ } else if (*dev == users->bt_audio) {
+ users->bt_audio = NULL;
+ (users->nbr_of_users)--;
+ } else
+ err = -EINVAL;
+
+ CG2900_DBG("bt_cmd 0x%X bt_audio 0x%X dev 0x%X",
+ (int)users->bt_cmd,
+ (int)users->bt_audio, (int)*dev);
+
+ /*
+ * If both BT Command channel users are de-registered we
+ * inform the chip handler.
+ */
+ if (!users->bt_cmd && !users->bt_audio &&
+ cb->last_bt_user_removed)
+ cb->last_bt_user_removed(&(core_info->chip_dev));
+ } else if ((*dev)->h4_channel == chan->bt_acl_channel) {
+ if (*dev == users->bt_acl) {
+ users->bt_acl = NULL;
+ (users->nbr_of_users)--;
+ } else
+ err = -EINVAL;
+ } else if ((*dev)->h4_channel == chan->bt_evt_channel) {
+ if (*dev == users->bt_evt) {
+ users->bt_evt = NULL;
+ (users->nbr_of_users)--;
+ } else
+ err = -EINVAL;
+ } else if ((*dev)->h4_channel == chan->gnss_channel) {
+ if (*dev == users->gnss) {
+ users->gnss = NULL;
+ (users->nbr_of_users)--;
+ } else
+ err = -EINVAL;
+
+ /*
+ * If the GNSS channel user is de-registered we inform
+ * the chip handler.
+ */
+ if (users->gnss == NULL && cb->last_gnss_user_removed)
+ cb->last_gnss_user_removed(&(core_info->chip_dev));
+ } else if ((*dev)->h4_channel == chan->fm_radio_channel) {
+ if (*dev == users->fm_radio) {
+ users->fm_radio = NULL;
+ (users->nbr_of_users)--;
+ } else if (*dev == users->fm_radio_audio) {
+ users->fm_radio_audio = NULL;
+ (users->nbr_of_users)--;
+ } else
+ err = -EINVAL;
+
+ /*
+ * If both FM Radio channel users are de-registered we inform
+ * the chip handler.
+ */
+ if (!users->fm_radio && !users->fm_radio_audio &&
+ cb->last_fm_user_removed)
+ cb->last_fm_user_removed(&(core_info->chip_dev));
+ } else if ((*dev)->h4_channel == chan->debug_channel) {
+ if (*dev == users->debug)
+ users->debug = NULL;
+ else
+ err = -EINVAL;
+ } else if ((*dev)->h4_channel == chan->ste_tools_channel) {
+ if (*dev == users->ste_tools)
+ users->ste_tools = NULL;
+ else
+ err = -EINVAL;
+ } else if ((*dev)->h4_channel == chan->hci_logger_channel) {
+ if (*dev == users->hci_logger)
+ users->hci_logger = NULL;
+ else
+ err = -EINVAL;
+ } else if ((*dev)->h4_channel == chan->us_ctrl_channel) {
+ if (*dev == users->us_ctrl)
+ users->us_ctrl = NULL;
+ else
+ err = -EINVAL;
+ } else if ((*dev)->h4_channel == chan->core_channel) {
+ if (*dev == users->core) {
+ users->core = NULL;
+ (users->nbr_of_users)--;
+ } else
+ err = -EINVAL;
+ } else {
+ CG2900_ERR("Bad H:4 channel supplied: 0x%X",
+ (*dev)->h4_channel);
+ return -EINVAL;
+ }
+
+ if (err)
+ CG2900_ERR("Trying to remove device that was not registered");
+
+ /*
+ * Free the device even if there is an error with the device.
+ * Also set to NULL to inform caller about the free.
+ */
+ free_user_dev(dev);
+
+ return err;
+}
+
+/**
+ * chip_startup() - Start the connectivity controller and download
patches and settings.
+ */
+static void chip_startup(void)
+{
+ struct hci_command_hdr cmd;
+
+ CG2900_INFO("chip_startup");
+
+ SET_MAIN_STATE(CORE_BOOTING);
+ SET_BOOT_STATE(BOOT_NOT_STARTED);
+
+ /*
+ * Transmit HCI reset command to ensure the chip is using
+ * the correct transport
+ */
+ cmd.opcode = cpu_to_le16(HCI_OP_RESET);
+ cmd.plen = 0; /* No parameters for HCI reset */
+ create_and_send_bt_cmd(&cmd, sizeof(cmd));
+}
+
+/**
+ * chip_shutdown() - Reset and power the chip off.
+ */
+static void chip_shutdown(void)
+{
+ int err = 0;
+ struct trans_info *trans_info = core_info->trans_info;
+ struct cg2900_chip_callbacks *cb = &(core_info->chip_dev.cb);
+
+ CG2900_INFO("chip_shutdown");
+
+ /* First do a quick power switch of the chip to assure a good state */
+ if (trans_info && trans_info->cb.set_chip_power)
+ trans_info->cb.set_chip_power(false);
+
+ /*
+ * Wait 50ms before continuing to be sure that the chip detects
+ * chip power off.
+ */
+ schedule_timeout_interruptible(
+ msecs_to_jiffies(LINE_TOGGLE_DETECT_TIMEOUT));
+
+ if (trans_info && trans_info->cb.set_chip_power)
+ trans_info->cb.set_chip_power(true);
+
+ /* Wait 100ms before continuing to be sure that the chip is ready */
+ schedule_timeout_interruptible(msecs_to_jiffies(CHIP_READY_TIMEOUT));
+
+ /*
+ * Let the chip handler finish the reset if any callback is registered.
+ * Otherwise we are finished.
+ */
+ if (!cb->chip_shutdown) {
+ CG2900_DBG("No registered handler. Finishing shutdown.");
+ cg2900_chip_shutdown_finished(err);
+ return;
+ }
+
+ err = cb->chip_shutdown(&(core_info->chip_dev));
+ if (err) {
+ CG2900_ERR("chip_shutdown failed (%d). Finishing shutdown.",
+ err);
+ cg2900_chip_shutdown_finished(err);
+ }
+}
+
+/**
+ * handle_reset_cmd_complete_evt() - Handle a received HCI Command
Complete event for a Reset command.
+ * @data: Pointer to received HCI data packet.
+ *
+ * Returns:
+ * True, if packet was handled internally,
+ * False, otherwise.
+ */
+static bool handle_reset_cmd_complete_evt(u8 *data)
+{
+ bool pkt_handled = false;
+ u8 status = data[0];
+ struct hci_command_hdr cmd;
+
+ CG2900_INFO("Received Reset complete event with status 0x%X", status);
+
+ if ((core_info->main_state == CORE_BOOTING ||
+ core_info->main_state == CORE_INITIALIZING) &&
+ core_info->boot_state == BOOT_NOT_STARTED) {
+ /* Transmit HCI Read Local Version Information command */
+ SET_BOOT_STATE(BOOT_READ_LOCAL_VERSION_INFORMATION);
+ cmd.opcode = cpu_to_le16(HCI_OP_READ_LOCAL_VERSION);
+ cmd.plen = 0; /* No parameters for HCI reset */
+ create_and_send_bt_cmd(&cmd, sizeof(cmd));
+
+ pkt_handled = true;
+ }
+
+ return pkt_handled;
+}
+
+/**
+ * handle_read_local_version_info_cmd_complete_evt() - Handle a
received HCI Command Complete event for a ReadLocalVersionInformation
command.
+ * @data: Pointer to received HCI data packet.
+ *
+ * Returns:
+ * True, if packet was handled internally,
+ * False, otherwise.
+ */
+static bool handle_read_local_version_info_cmd_complete_evt(u8 *data)
+{
+ bool chip_handled = false;
+ struct list_head *cursor;
+ struct chip_handler_item *tmp;
+ struct local_chip_info *chip;
+ struct cg2900_chip_info *chip_info;
+ struct cg2900_chip_callbacks *cb;
+ int err;
+ struct hci_rp_read_local_version *evt;
+
+ /* Check we're in the right state */
+ if ((core_info->main_state != CORE_BOOTING &&
+ core_info->main_state != CORE_INITIALIZING) ||
+ core_info->boot_state != BOOT_READ_LOCAL_VERSION_INFORMATION)
+ return false;
+
+ /* We got an answer for our HCI command. Extract data */
+ evt = (struct hci_rp_read_local_version *)data;
+
+ /* We will handle the packet */
+ if (HCI_BT_ERROR_NO_ERROR != evt->status) {
+ CG2900_ERR("Received Read Local Version Information with "
+ "status 0x%X", evt->status);
+ SET_BOOT_STATE(BOOT_FAILED);
+ cg2900_reset(NULL);
+ return true;
+ }
+
+ /* The command worked. Store the data */
+ chip = &(core_info->local_chip_info);
+ chip->version_set = true;
+ chip->hci_version = evt->hci_ver;
+ chip->hci_revision = le16_to_cpu(evt->hci_rev);
+ chip->lmp_pal_version = evt->lmp_ver;
+ chip->manufacturer = le16_to_cpu(evt->manufacturer);
+ chip->lmp_pal_subversion = le16_to_cpu(evt->lmp_subver);
+ CG2900_DBG("Received Read Local Version Information with:\n"
+ "\thci_version: 0x%X\n"
+ "\thci_revision: 0x%X\n"
+ "\tlmp_pal_version: 0x%X\n"
+ "\tmanufacturer: 0x%X\n"
+ "\tlmp_pal_subversion: 0x%X",
+ chip->hci_version, chip->hci_revision,
+ chip->lmp_pal_version, chip->manufacturer,
+ chip->lmp_pal_subversion);
+
+ cg2900_devices_set_hci_revision(chip->hci_version,
+ chip->hci_revision,
+ chip->lmp_pal_version,
+ chip->lmp_pal_subversion,
+ chip->manufacturer);
+
+ /* Received good confirmation. Find handler for the chip. */
+ chip_info = &(core_info->chip_dev.chip);
+ chip_info->hci_revision = chip->hci_revision;
+ chip_info->hci_sub_version = chip->lmp_pal_subversion;
+ chip_info->manufacturer = chip->manufacturer;
+
+ memset(&(core_info->chip_dev.cb), 0, sizeof(core_info->chip_dev.cb));
+
+ list_for_each(cursor, &chip_handlers) {
+ tmp = list_entry(cursor, struct chip_handler_item, list);
+ chip_handled = tmp->cb.check_chip_support(
+ &(core_info->chip_dev));
+ if (chip_handled) {
+ CG2900_INFO("Chip handler found");
+ break;
+ }
+ }
+
+ if (core_info->main_state == CORE_INITIALIZING) {
+ /*
+ * We are now finished with the start-up during HwRegistered
+ * operation.
+ */
+ SET_BOOT_STATE(BOOT_READY);
+ wake_up_interruptible(&main_wait_queue);
+ } else if (!chip_handled) {
+ CG2900_INFO("No chip handler found. Start-up complete");
+ SET_BOOT_STATE(BOOT_READY);
+ cg2900_chip_startup_finished(0);
+ } else {
+ cb = &(core_info->chip_dev.cb);
+ if (!cb->chip_startup)
+ cg2900_chip_startup_finished(0);
+ else {
+ err = cb->chip_startup(&(core_info->chip_dev));
+ if (err)
+ cg2900_chip_startup_finished(err);
+ }
+ }
+
+ return true;
+}
+
+/**
+ * handle_rx_data_bt_evt() - Check if data should be handled in CG2900 Core.
+ * @skb: Data packet
+ *
+ * The handle_rx_data_bt_evt() function checks if received data should be
+ * handled in CG2900 Core. If so handle it correctly.
+ * Received data is always HCI BT Event.
+ *
+ * Returns:
+ * True, if packet was handled internally,
+ * False, otherwise.
+ */
+static bool handle_rx_data_bt_evt(struct sk_buff *skb)
+{
+ bool pkt_handled = false;
+ u8 *data = &(skb->data[CG2900_SKB_RESERVE]);
+ struct hci_event_hdr *evt;
+ struct hci_ev_cmd_complete *cmd_complete;
+ u16 op_code;
+
+ evt = (struct hci_event_hdr *)data;
+
+ /* First check the event code */
+ if (HCI_EV_CMD_COMPLETE != evt->evt)
+ return false;
+
+ data += sizeof(*evt);
+ cmd_complete = (struct hci_ev_cmd_complete *)data;
+
+ op_code = le16_to_cpu(cmd_complete->opcode);
+
+ CG2900_DBG_DATA("Received Command Complete: op_code = 0x%04X", op_code);
+ data += sizeof(*cmd_complete); /* Move to first byte after OCF */
+
+ if (op_code == HCI_OP_RESET)
+ pkt_handled = handle_reset_cmd_complete_evt(data);
+ else if (op_code == HCI_OP_READ_LOCAL_VERSION)
+ pkt_handled =
+ handle_read_local_version_info_cmd_complete_evt(data);
+
+ if (pkt_handled)
+ kfree_skb(skb);
+
+ return pkt_handled;
+}
+
+/**
+ * test_char_dev_tx_received() - Handle data received from CG2900 Core.
+ * @dev: Current transport device information.
+ * @skb: Buffer with data coming form device.
+ */
+static int test_char_dev_tx_received(struct cg2900_trans_dev *dev,
+ struct sk_buff *skb)
+{
+ skb_queue_tail(&core_info->test_char_dev->rx_queue, skb);
+ wake_up_interruptible(&char_wait_queue);
+ return 0;
+}
+
+/**
+ * test_char_dev_open() - User space char device has been opened.
+ * @inode: Device driver information.
+ * @filp: Pointer to the file struct.
+ *
+ * Returns:
+ * 0 if there is no error.
+ * -EACCES if transport already exists.
+ * -ENOMEM if allocation fails.
+ * Errors from create_work_item.
+ */
+static int test_char_dev_open(struct inode *inode, struct file *filp)
+{
+ struct cg2900_trans_callbacks cb = {
+ .write = test_char_dev_tx_received,
+ .open = NULL,
+ .close = NULL,
+ .set_chip_power = NULL
+ };
+
+ CG2900_INFO("test_char_dev_open");
+ return cg2900_register_trans_driver(&cb, NULL);
+}
+
+/**
+ * test_char_dev_release() - User space char device has been closed.
+ * @inode: Device driver information.
+ * @filp: Pointer to the file struct.
+ *
+ * Returns:
+ * 0 if there is no error.
+ */
+static int test_char_dev_release(struct inode *inode, struct file *filp)
+{
+ /* Clean the message queue */
+ skb_queue_purge(&core_info->test_char_dev->rx_queue);
+ return cg2900_deregister_trans_driver();
+}
+
+/**
+ * test_char_dev_read() - Queue and copy buffer to user space char device.
+ * @filp: Pointer to the file struct.
+ * @buf: Received buffer.
+ * @count: Count of received data in bytes.
+ * @f_pos: Position in buffer.
+ *
+ * Returns:
+ * >= 0 is number of bytes read.
+ * -EFAULT if copy_to_user fails.
+ */
+static ssize_t test_char_dev_read(struct file *filp, char __user *buf,
+ size_t count, loff_t *f_pos)
+{
+ struct sk_buff *skb;
+ int bytes_to_copy;
+ int err;
+ struct sk_buff_head *rx_queue = &core_info->test_char_dev->rx_queue;
+
+ CG2900_INFO("test_char_dev_read");
+
+ if (skb_queue_empty(rx_queue))
+ wait_event_interruptible(char_wait_queue,
+ !(skb_queue_empty(rx_queue)));
+
+ skb = skb_dequeue(rx_queue);
+ if (!skb) {
+ CG2900_INFO("skb queue is empty - return with zero bytes");
+ bytes_to_copy = 0;
+ goto finished;
+ }
+
+ bytes_to_copy = min(count, skb->len);
+ err = copy_to_user(buf, skb->data, bytes_to_copy);
+ if (err) {
+ skb_queue_head(rx_queue, skb);
+ return -EFAULT;
+ }
+
+ skb_pull(skb, bytes_to_copy);
+
+ if (skb->len > 0)
+ skb_queue_head(rx_queue, skb);
+ else
+ kfree_skb(skb);
+
+finished:
+ return bytes_to_copy;
+}
+
+/**
+ * test_char_dev_write() - Copy buffer from user and write to CG2900 Core.
+ * @filp: Pointer to the file struct.
+ * @buf: Read buffer.
+ * @count: Size of the buffer write.
+ * @f_pos: Position in buffer.
+ *
+ * Returns:
+ * >= 0 is number of bytes written.
+ * -EFAULT if copy_from_user fails.
+ */
+static ssize_t test_char_dev_write(struct file *filp, const char __user *buf,
+ size_t count, loff_t *f_pos)
+{
+ struct sk_buff *skb;
+
+ CG2900_INFO("test_char_dev_write count %d", count);
+
+ /* Allocate the SKB and reserve space for the header */
+ skb = alloc_skb(count + RX_SKB_RESERVE, GFP_ATOMIC);
+ if (!skb) {
+ CG2900_ERR("Failed to alloc skb");
+ return -ENOMEM;
+ }
+ skb_reserve(skb, RX_SKB_RESERVE);
+
+ if (copy_from_user(skb_put(skb, count), buf, count)) {
+ kfree_skb(skb);
+ return -EFAULT;
+ }
+ cg2900_data_from_chip(skb);
+
+ return count;
+}
+
+/**
+ * test_char_dev_poll() - Handle POLL call to the interface.
+ * @filp: Pointer to the file struct.
+ * @wait: Poll table supplied to caller.
+ *
+ * Returns:
+ * Mask of current set POLL values (0 or (POLLIN | POLLRDNORM))
+ */
+static unsigned int test_char_dev_poll(struct file *filp, poll_table *wait)
+{
+ unsigned int mask = 0;
+
+ poll_wait(filp, &char_wait_queue, wait);
+
+ if (!(skb_queue_empty(&core_info->test_char_dev->rx_queue)))
+ mask |= POLLIN | POLLRDNORM;
+
+ return mask;
+}
+
+/*
+ * struct test_char_dev_fops - Test char devices file operations.
+ * @read: Function that reads from the char device.
+ * @write: Function that writes to the char device.
+ * @poll: Function that handles poll call to the fd.
+ */
+static const struct file_operations test_char_dev_fops = {
+ .open = test_char_dev_open,
+ .release = test_char_dev_release,
+ .read = test_char_dev_read,
+ .write = test_char_dev_write,
+ .poll = test_char_dev_poll
+};
+
+/**
+ * test_char_dev_create() - Create a char device for testing.
+ *
+ * Creates a separate char device that will interact directly with userspace
+ * test application.
+ *
+ * Returns:
+ * 0 if there is no error.
+ * -ENOMEM if allocation fails.
+ * -EBUSY if device has already been allocated.
+ * Error codes from misc_register.
+ */
+static int test_char_dev_create(void)
+{
+ int err;
+
+ if (core_info->test_char_dev) {
+ CG2900_ERR("Trying to allocate test_char_dev twice");
+ return -EBUSY;
+ }
+
+ core_info->test_char_dev = kzalloc(sizeof(*(core_info->test_char_dev)),
+ GFP_KERNEL);
+ if (!core_info->test_char_dev) {
+ CG2900_ERR("Couldn't allocate test_char_dev");
+ return -ENOMEM;
+ }
+
+ /* Initialize the RX queue */
+ skb_queue_head_init(&core_info->test_char_dev->rx_queue);
+
+ /* Prepare miscdevice struct before registering the device */
+ core_info->test_char_dev->test_miscdev.minor = MISC_DYNAMIC_MINOR;
+ core_info->test_char_dev->test_miscdev.name = CG2900_CDEV_NAME;
+ core_info->test_char_dev->test_miscdev.fops = &test_char_dev_fops;
+ core_info->test_char_dev->test_miscdev.parent =
+ core_info->dev->this_device;
+
+ err = misc_register(&core_info->test_char_dev->test_miscdev);
+ if (err) {
+ CG2900_ERR("Error %d registering misc dev!", err);
+ kfree(core_info->test_char_dev);
+ core_info->test_char_dev = NULL;
+ return err;
+ }
+
+ return 0;
+}
+
+/**
+ * test_char_dev_destroy() - Clean up after test_char_dev_create().
+ */
+static void test_char_dev_destroy(void)
+{
+ int err;
+
+ if (!core_info->test_char_dev)
+ return;
+
+ err = misc_deregister(&core_info->test_char_dev->test_miscdev);
+ if (err)
+ CG2900_ERR("Error %d deregistering misc dev!", err);
+
+ /* Clean the message queue */
+ skb_queue_purge(&core_info->test_char_dev->rx_queue);
+
+ kfree(core_info->test_char_dev);
+ core_info->test_char_dev = NULL;
+}
+
+/**
+ * open_transport() - Open the CG2900 transport for data transfers.
+ *
+ * Returns:
+ * 0 if there is no error,
+ * -EACCES if write to transport failed,
+ * -EIO if transport has not been selected or chip did not answer
to commands.
+ */
+static int open_transport(void)
+{
+ int err = 0;
+ struct trans_info *trans_info = core_info->trans_info;
+
+ CG2900_INFO("open_transport");
+
+ if (trans_info && trans_info->cb.open) {
+ err = trans_info->cb.open(&trans_info->dev);
+ if (err)
+ CG2900_ERR("Transport open failed (%d)", err);
+ }
+
+ if (!err)
+ SET_TRANSPORT_STATE(TRANS_OPENED);
+
+ return err;
+}
+
+/**
+ * close_transport() - Close the CG2900 transport for data transfers.
+ */
+static void close_transport(void)
+{
+ struct trans_info *trans_info = core_info->trans_info;
+
+ CG2900_INFO("close_transport");
+
+ /* Check so transport has not already been removed */
+ if (TRANS_OPENED == core_info->transport_state)
+ SET_TRANSPORT_STATE(TRANS_CLOSED);
+
+ if (trans_info && trans_info->cb.close) {
+ int err = trans_info->cb.close(&trans_info->dev);
+ if (err)
+ CG2900_ERR("Transport close failed (%d)", err);
+ }
+}
+
+/**
+ * create_work_item() - Create work item and add it to the work queue.
+ * @wq: work queue struct where the work will be added.
+ * @work_func: Work function.
+ * @data: Private data for the work.
+ *
+ * Returns:
+ * 0 if there is no error.
+ * -EBUSY if not possible to queue work.
+ * -ENOMEM if allocation fails.
+ */
+static int create_work_item(struct workqueue_struct *wq, work_func_t work_func,
+ void *data)
+{
+ struct cg2900_work_struct *new_work;
+ int err;
+
+ new_work = kmalloc(sizeof(*new_work), GFP_ATOMIC);
+ if (!new_work) {
+ CG2900_ERR("Failed to alloc memory for cg2900_work_struct!");
+ return -ENOMEM;
+ }
+
+ new_work->data = data;
+ INIT_WORK(&new_work->work, work_func);
+
+ err = queue_work(wq, &new_work->work);
+ if (!err) {
+ CG2900_ERR("Failed to queue work_struct because it's already "
+ "in the queue!");
+ kfree(new_work);
+ return -EBUSY;
+ }
+
+ return 0;
+}
+
+/**
+ * work_hw_registered() - Called when the interface to HW has been established.
+ * @work: Reference to work data.
+ *
+ * Since there now is a transport identify the connected chip and decide which
+ * chip handler to use.
+ */
+static void work_hw_registered(struct work_struct *work)
+{
+ struct cg2900_work_struct *current_work = NULL;
+ bool run_shutdown = true;
+ struct cg2900_chip_callbacks *cb;
+ struct cg2900_h4_channels *chan;
+ struct trans_info *trans_info = core_info->trans_info;
+ struct hci_command_hdr cmd;
+
+ CG2900_INFO("work_hw_registered");
+
+ if (!work) {
+ CG2900_ERR("work == NULL");
+ return;
+ }
+
+ current_work = container_of(work, struct cg2900_work_struct, work);
+
+ SET_MAIN_STATE(CORE_INITIALIZING);
+ SET_BOOT_STATE(BOOT_NOT_STARTED);
+
+ /*
+ * This might look strange, but we need to read out
+ * the revision info in order to be able to shutdown the chip properly.
+ */
+ if (trans_info && trans_info->cb.set_chip_power)
+ trans_info->cb.set_chip_power(true);
+
+ /* Wait 100ms before continuing to be sure that the chip is ready */
+ schedule_timeout_interruptible(msecs_to_jiffies(CHIP_READY_TIMEOUT));
+
+ /*
+ * Transmit HCI reset command to ensure the chip is using
+ * the correct transport
+ */
+ cmd.opcode = cpu_to_le16(HCI_OP_RESET);
+ cmd.plen = 0; /* No parameters for HCI reset */
+ create_and_send_bt_cmd(&cmd, sizeof(cmd));
+
+ /* Wait up to 500 milliseconds for revision to be read out */
+ CG2900_DBG("Wait up to 500 milliseconds for revision to be read.");
+ wait_event_interruptible_timeout(main_wait_queue,
+ (BOOT_READY == core_info->boot_state),
+ msecs_to_jiffies(REVISION_READOUT_TIMEOUT));
+
+ /*
+ * If we are in BOOT_READY we have a good revision.
+ * Otherwise handle this as an error and switch to default handler.
+ */
+ if (BOOT_READY != core_info->boot_state) {
+ chip_not_detected();
+ run_shutdown = false;
+ }
+
+ /* Read out the channels for connected chip */
+ cb = &(core_info->chip_dev.cb);
+ chan = &(core_info->h4_channels);
+ if (cb->get_h4_channel) {
+ /* Get the H4 channel ID for all channels */
+ cb->get_h4_channel(CG2900_BT_CMD, &(chan->bt_cmd_channel));
+ cb->get_h4_channel(CG2900_BT_ACL, &(chan->bt_acl_channel));
+ cb->get_h4_channel(CG2900_BT_EVT, &(chan->bt_evt_channel));
+ cb->get_h4_channel(CG2900_GNSS, &(chan->gnss_channel));
+ cb->get_h4_channel(CG2900_FM_RADIO, &(chan->fm_radio_channel));
+ cb->get_h4_channel(CG2900_DEBUG, &(chan->debug_channel));
+ cb->get_h4_channel(CG2900_STE_TOOLS,
+ &(chan->ste_tools_channel));
+ cb->get_h4_channel(CG2900_HCI_LOGGER,
+ &(chan->hci_logger_channel));
+ cb->get_h4_channel(CG2900_US_CTRL, &(chan->us_ctrl_channel));
+ cb->get_h4_channel(CG2900_CORE, &(chan->core_channel));
+ }
+
+ /*
+ * Now it is time to shutdown the controller to reduce
+ * power consumption until any users register
+ */
+ if (run_shutdown)
+ chip_shutdown();
+ else
+ cg2900_chip_shutdown_finished(0);
+
+ kfree(current_work);
+}
+
+/*
+ * CG2900 API functions
+ */
+
+struct cg2900_device *cg2900_register_user(char *name,
+ struct cg2900_callbacks *cb)
+{
+ struct cg2900_device *current_dev;
+ int err;
+ struct trans_info *trans_info = core_info->trans_info;
+
+ CG2900_INFO("cg2900_register_user %s", name);
+
+ BUG_ON(!core_info);
+
+ /* Wait for state CORE_IDLE or CORE_ACTIVE. */
+ err = wait_event_interruptible_timeout(main_wait_queue,
+ (CORE_IDLE == core_info->main_state ||
+ CORE_ACTIVE == core_info->main_state),
+ msecs_to_jiffies(LINE_TOGGLE_DETECT_TIMEOUT));
+
+ if (err <= 0) {
+ if (CORE_INITIALIZING == core_info->main_state)
+ CG2900_ERR("Transport not opened");
+ else
+ CG2900_ERR("cg2900_register_user currently busy (0x%X)."
+ " Try again.", core_info->main_state);
+ return NULL;
+ }
+
+ /* Allocate device */
+ current_dev = kzalloc(sizeof(*current_dev), GFP_ATOMIC);
+ if (!current_dev) {
+ CG2900_ERR("Couldn't allocate current dev");
+ goto error_handling;
+ }
+
+ if (!core_info->chip_dev.cb.get_h4_channel) {
+ CG2900_ERR("No channel handler registered");
+ goto error_handling;
+ }
+ err = core_info->chip_dev.cb.get_h4_channel(name,
+ &(current_dev->h4_channel));
+ if (err) {
+ CG2900_ERR("Couldn't find H4 channel for %s", name);
+ goto error_handling;
+ }
+ current_dev->dev = core_info->dev->this_device;
+ current_dev->cb = kmalloc(sizeof(*(current_dev->cb)),
+ GFP_ATOMIC);
+ if (!current_dev->cb) {
+ CG2900_ERR("Couldn't allocate cb ");
+ goto error_handling;
+ }
+ memcpy((char *)current_dev->cb, (char *)cb,
+ sizeof(*(current_dev->cb)));
+
+ /* Retrieve pointer to the correct CG2900 Core user structure */
+ err = add_h4_user(current_dev, name);
+
+ if (!err) {
+ CG2900_DBG("H:4 channel 0x%X registered",
+ current_dev->h4_channel);
+ } else {
+ CG2900_ERR("H:4 channel 0x%X already registered "
+ "or other error (%d)",
+ current_dev->h4_channel, err);
+ goto error_handling;
+ }
+
+ if (CORE_ACTIVE != core_info->main_state &&
+ core_info->users.nbr_of_users == 1) {
+ /* Open transport and start-up the chip */
+ if (trans_info && trans_info->cb.set_chip_power)
+ trans_info->cb.set_chip_power(true);
+
+ /* Wait 100ms to be sure that the chip is ready */
+ schedule_timeout_interruptible(
+ msecs_to_jiffies(CHIP_READY_TIMEOUT));
+
+ err = open_transport();
+ if (err) {
+ /*
+ * Remove the user. If there is no error it will be
+ * freed as well.
+ */
+ remove_h4_user(¤t_dev);
+ goto finished;
+ }
+
+ chip_startup();
+
+ /* Wait up to 15 seconds for chip to start */
+ CG2900_DBG("Wait up to 15 seconds for chip to start..");
+ wait_event_interruptible_timeout(main_wait_queue,
+ (CORE_ACTIVE == core_info->main_state ||
+ CORE_IDLE == core_info->main_state),
+ msecs_to_jiffies(CHIP_STARTUP_TIMEOUT));
+ if (CORE_ACTIVE != core_info->main_state) {
+ CG2900_ERR("ST-Ericsson CG2900 driver failed to "
+ "start");
+
+ /* Close the transport and power off the chip */
+ close_transport();
+
+ /*
+ * Remove the user. If there is no error it will be
+ * freed as well.
+ */
+ remove_h4_user(¤t_dev);
+
+ /* Chip shut-down finished, set correct state. */
+ SET_MAIN_STATE(CORE_IDLE);
+ }
+ }
+ goto finished;
+
+error_handling:
+ free_user_dev(¤t_dev);
+finished:
+ return current_dev;
+}
+EXPORT_SYMBOL(cg2900_register_user);
+
+void cg2900_deregister_user(struct cg2900_device *dev)
+{
+ int h4_channel;
+ int err = 0;
+
+ CG2900_INFO("cg2900_deregister_user");
+
+ BUG_ON(!core_info);
+
+ if (!dev) {
+ CG2900_ERR("Calling with NULL pointer");
+ return;
+ }
+
+ h4_channel = dev->h4_channel;
+
+ /* Remove the user. If there is no error it will be freed as well */
+ err = remove_h4_user(&dev);
+ if (err) {
+ CG2900_ERR("Trying to deregister non-registered "
+ "H:4 channel 0x%X or other error %d",
+ h4_channel, err);
+ return;
+ }
+
+ CG2900_DBG("H:4 channel 0x%X deregistered", h4_channel);
+
+ if (0 != core_info->users.nbr_of_users)
+ /* This was not the last user, we're done. */
+ return;
+
+ if (CORE_IDLE == core_info->main_state)
+ /* Chip has already been shut down. */
+ return;
+
+ SET_MAIN_STATE(CORE_CLOSING);
+ chip_shutdown();
+
+ /* Wait up to 15 seconds for chip to shut-down */
+ CG2900_DBG("Wait up to 15 seconds for chip to shut-down..");
+ wait_event_interruptible_timeout(main_wait_queue,
+ (CORE_IDLE == core_info->main_state),
+ msecs_to_jiffies(CHIP_SHUTDOWN_TIMEOUT));
+
+ /* Force shutdown if we timed out */
+ if (CORE_IDLE != core_info->main_state) {
+ CG2900_ERR("ST-Ericsson CG2900 Core Driver was shut-down with "
+ "problems.");
+
+ /* Close the transport and power off the chip */
+ close_transport();
+
+ /* Chip shut-down finished, set correct state. */
+ SET_MAIN_STATE(CORE_IDLE);
+ }
+}
+EXPORT_SYMBOL(cg2900_deregister_user);
+
+int cg2900_reset(struct cg2900_device *dev)
+{
+ CG2900_INFO("cg2900_reset");
+
+ BUG_ON(!core_info);
+
+ SET_MAIN_STATE(CORE_RESETING);
+
+ /* Shutdown the chip */
+ chip_shutdown();
+
+ /*
+ * Inform all registered users about the reset and free the user devices
+ * Don't send reset for debug and logging channels
+ */
+ handle_reset_of_user(&(core_info->users.bt_cmd));
+ handle_reset_of_user(&(core_info->users.bt_audio));
+ handle_reset_of_user(&(core_info->users.bt_acl));
+ handle_reset_of_user(&(core_info->users.bt_evt));
+ handle_reset_of_user(&(core_info->users.fm_radio));
+ handle_reset_of_user(&(core_info->users.fm_radio_audio));
+ handle_reset_of_user(&(core_info->users.gnss));
+ handle_reset_of_user(&(core_info->users.core));
+
+ core_info->users.nbr_of_users = 0;
+
+ /* Reset finished. We are now idle until first user is registered */
+ SET_MAIN_STATE(CORE_IDLE);
+
+ /*
+ * Send wake-up since this might have been called from a failed boot.
+ * No harm done if it is a CG2900 Core user who called.
+ */
+ wake_up_interruptible(&main_wait_queue);
+
+ return 0;
+}
+EXPORT_SYMBOL(cg2900_reset);
+
+struct sk_buff *cg2900_alloc_skb(unsigned int size, gfp_t priority)
+{
+ struct sk_buff *skb;
+
+ CG2900_INFO("cg2900_alloc_skb");
+ CG2900_DBG("size %d bytes", size);
+
+ /* Allocate the SKB and reserve space for the header */
+ skb = alloc_skb(size + CG2900_SKB_RESERVE, priority);
+ if (skb)
+ skb_reserve(skb, CG2900_SKB_RESERVE);
+
+ return skb;
+}
+EXPORT_SYMBOL(cg2900_alloc_skb);
+
+int cg2900_write(struct cg2900_device *dev, struct sk_buff *skb)
+{
+ int err = 0;
+ u8 *h4_header;
+ struct cg2900_chip_callbacks *cb;
+
+ CG2900_DBG_DATA("cg2900_write");
+
+ BUG_ON(!core_info);
+
+ if (!dev) {
+ CG2900_ERR("cg2900_write with no device");
+ return -EINVAL;
+ }
+
+ if (!skb) {
+ CG2900_ERR("cg2900_write with no sk_buffer");
+ return -EINVAL;
+ }
+
+ CG2900_DBG_DATA("Length %d bytes", skb->len);
+
+ if (core_info->h4_channels.hci_logger_channel == dev->h4_channel) {
+ /*
+ * Treat the HCI logger write differently.
+ * A write can only mean a change of configuration.
+ */
+ err = enable_hci_logger(skb);
+ } else if (core_info->h4_channels.core_channel == dev->h4_channel) {
+ CG2900_ERR("Not possible to write data on core channel, "
+ "it only supports enable / disable chip");
+ err = -EPERM;
+ } else if (CORE_ACTIVE == core_info->main_state) {
+ /*
+ * Move the data pointer to the H:4 header position and
+ * store the H4 header.
+ */
+ h4_header = skb_push(skb, CG2900_SKB_RESERVE);
+ *h4_header = (u8)dev->h4_channel;
+
+ /*
+ * Check if the chip handler wants to handle this packet.
+ * If not, send it to the transport.
+ */
+ cb = &(core_info->chip_dev.cb);
+ if (!cb->data_to_chip ||
+ !(cb->data_to_chip(&(core_info->chip_dev), dev, skb)))
+ transmit_skb_to_chip(skb, dev->logger_enabled);
+ } else {
+ CG2900_ERR("Trying to transmit data when CG2900 Core is not "
+ "active");
+ err = -EACCES;
+ }
+
+ return err;
+}
+EXPORT_SYMBOL(cg2900_write);
+
+bool cg2900_get_local_revision(struct cg2900_rev_data *rev_data)
+{
+ BUG_ON(!core_info);
+
+ if (!rev_data) {
+ CG2900_ERR("Calling with rev_data NULL");
+ return false;
+ }
+
+ if (!core_info->local_chip_info.version_set)
+ return false;
+
+ rev_data->revision = core_info->local_chip_info.hci_revision;
+ rev_data->sub_version = core_info->local_chip_info.lmp_pal_subversion;
+
+ return true;
+}
+EXPORT_SYMBOL(cg2900_get_local_revision);
+
+int cg2900_register_chip_driver(struct cg2900_id_callbacks *cb)
+{
+ struct chip_handler_item *item;
+
+ CG2900_INFO("cg2900_register_chip_driver");
+
+ if (!cb) {
+ CG2900_ERR("NULL supplied as cb");
+ return -EINVAL;
+ }
+
+ item = kzalloc(sizeof(*item), GFP_ATOMIC);
+ if (!item) {
+ CG2900_ERR("Failed to alloc memory!");
+ return -ENOMEM;
+ }
+
+ memcpy(&(item->cb), cb, sizeof(cb));
+ list_add_tail(&item->list, &chip_handlers);
+ return 0;
+}
+EXPORT_SYMBOL(cg2900_register_chip_driver);
+
+int cg2900_register_trans_driver(struct cg2900_trans_callbacks *cb, void *data)
+{
+ int err;
+
+ BUG_ON(!core_info);
+
+ CG2900_INFO("cg2900_register_trans_driver");
+
+ if (core_info->trans_info) {
+ CG2900_ERR("trans_info already exists");
+ return -EACCES;
+ }
+
+ core_info->trans_info = kzalloc(sizeof(*(core_info->trans_info)),
+ GFP_KERNEL);
+ if (!core_info->trans_info) {
+ CG2900_ERR("Could not allocate trans_info");
+ return -ENOMEM;
+ }
+
+ memcpy(&(core_info->trans_info->cb), cb, sizeof(*cb));
+ core_info->trans_info->dev.dev = core_info->dev->this_device;
+ core_info->trans_info->dev.user_data = data;
+
+ err = create_work_item(core_info->wq, work_hw_registered, NULL);
+ if (err) {
+ CG2900_ERR("Could not create work item (%d) "
+ "work_hw_registered", err);
+ }
+
+ return err;
+}
+EXPORT_SYMBOL(cg2900_register_trans_driver);
+
+int cg2900_deregister_trans_driver(void)
+{
+ BUG_ON(!core_info);
+
+ CG2900_INFO("cg2900_deregister_trans_driver");
+
+ SET_MAIN_STATE(CORE_INITIALIZING);
+ SET_TRANSPORT_STATE(TRANS_INITIALIZING);
+
+ if (!core_info->trans_info)
+ return -EACCES;
+
+ kfree(core_info->trans_info);
+ core_info->trans_info = NULL;
+
+ return 0;
+}
+EXPORT_SYMBOL(cg2900_deregister_trans_driver);
+
+int cg2900_chip_startup_finished(int err)
+{
+ CG2900_INFO("cg2900_chip_startup_finished (%d)", err);
+
+ if (err)
+ /* Shutdown the chip */
+ chip_shutdown();
+ else
+ SET_MAIN_STATE(CORE_ACTIVE);
+
+ wake_up_interruptible(&main_wait_queue);
+
+ return 0;
+}
+EXPORT_SYMBOL(cg2900_chip_startup_finished);
+
+int cg2900_chip_shutdown_finished(int err)
+{
+ CG2900_INFO("cg2900_chip_shutdown_finished (%d)", err);
+
+ /* Close the transport, which will power off the chip */
+ close_transport();
+
+ /* Chip shut-down finished, set correct state and wake up the chip. */
+ SET_MAIN_STATE(CORE_IDLE);
+ wake_up_interruptible(&main_wait_queue);
+
+ return 0;
+}
+EXPORT_SYMBOL(cg2900_chip_shutdown_finished);
+
+int cg2900_send_to_chip(struct sk_buff *skb, bool use_logger)
+{
+ transmit_skb_to_chip(skb, use_logger);
+ return 0;
+}
+EXPORT_SYMBOL(cg2900_send_to_chip);
+
+struct cg2900_device *cg2900_get_bt_cmd_dev(void)
+{
+ if (core_info)
+ return core_info->users.bt_cmd;
+ else
+ return NULL;
+}
+EXPORT_SYMBOL(cg2900_get_bt_cmd_dev);
+
+struct cg2900_device *cg2900_get_fm_radio_dev(void)
+{
+ if (core_info)
+ return core_info->users.fm_radio;
+ else
+ return NULL;
+}
+EXPORT_SYMBOL(cg2900_get_fm_radio_dev);
+
+struct cg2900_device *cg2900_get_bt_audio_dev(void)
+{
+ if (core_info)
+ return core_info->users.bt_audio;
+ else
+ return NULL;
+}
+EXPORT_SYMBOL(cg2900_get_bt_audio_dev);
+
+struct cg2900_device *cg2900_get_fm_audio_dev(void)
+{
+ if (core_info)
+ return core_info->users.fm_radio_audio;
+ else
+ return NULL;
+}
+EXPORT_SYMBOL(cg2900_get_fm_audio_dev);
+
+struct cg2900_hci_logger_config *cg2900_get_hci_logger_config(void)
+{
+ if (core_info)
+ return &(core_info->hci_logger_config);
+ else
+ return NULL;
+}
+EXPORT_SYMBOL(cg2900_get_hci_logger_config);
+
+unsigned long cg2900_get_sleep_timeout(void)
+{
+ if (CORE_ACTIVE != core_info->main_state || !sleep_timeout_ms)
+ return 0;
+
+ return msecs_to_jiffies(sleep_timeout_ms);
+}
+EXPORT_SYMBOL(cg2900_get_sleep_timeout);
+
+void cg2900_data_from_chip(struct sk_buff *skb)
+{
+ struct cg2900_device *dev = NULL;
+ u8 h4_channel;
+ int err = 0;
+ struct cg2900_chip_callbacks *cb;
+ struct sk_buff *skb_log;
+ struct cg2900_device *logger;
+
+ CG2900_INFO("cg2900_data_from_chip");
+
+ if (!skb) {
+ CG2900_ERR("No data supplied");
+ return;
+ }
+
+ h4_channel = *(skb->data);
+
+ /*
+ * First check if this is the response for something
+ * we have sent internally.
+ */
+ if ((core_info->main_state == CORE_BOOTING ||
+ core_info->main_state == CORE_INITIALIZING) &&
+ (HCI_BT_EVT_H4_CHANNEL == h4_channel) &&
+ handle_rx_data_bt_evt(skb)) {
+ CG2900_DBG("Received packet handled internally");
+ return;
+ }
+
+ /* Find out where to route the data */
+ err = find_h4_user(h4_channel, &dev, skb);
+
+ /* Check if the chip handler wants to deal with the packet. */
+ cb = &(core_info->chip_dev.cb);
+ if (!err && cb->data_from_chip &&
+ cb->data_from_chip(&(core_info->chip_dev), dev, skb))
+ return;
+
+ if (err || !dev) {
+ CG2900_ERR("H:4 channel: 0x%X, does not match device",
+ h4_channel);
+ kfree_skb(skb);
+ return;
+ }
+
+ /*
+ * If HCI logging is enabled for this channel, copy the data to
+ * the HCI logging output.
+ */
+ logger = core_info->users.hci_logger;
+ if (!logger || !dev->logger_enabled)
+ goto transmit;
+
+ /*
+ * Alloc a new sk_buffer and copy the data into it.
+ * Then send it to the HCI logger.
+ */
+ skb_log = alloc_skb(skb->len + 1, GFP_ATOMIC);
+ if (!skb_log) {
+ CG2900_ERR("Couldn't allocate skb_log");
+ goto transmit;
+ }
+
+ memcpy(skb_put(skb_log, skb->len), skb->data, skb->len);
+ skb_log->data[0] = (u8) LOGGER_DIRECTION_RX;
+
+ if (logger->cb->read_cb)
+ logger->cb->read_cb(logger, skb_log);
+
+transmit:
+ /* Remove the H4 header */
+ (void)skb_pull(skb, CG2900_SKB_RESERVE);
+
+ /* Call the Read callback */
+ if (dev->cb->read_cb)
+ dev->cb->read_cb(dev, skb);
+}
+EXPORT_SYMBOL(cg2900_data_from_chip);
+
+/*
+ * Module INIT and EXIT functions
+ */
+
+/**
+ * cg2900_init() - Initialize module.
+ *
+ * The cg2900_init() function initialize the transport and CG2900 Core, then
+ * register to the transport framework.
+ *
+ * Returns:
+ * 0 if success.
+ * -ENOMEM for failed alloc or structure creation.
+ * Error codes generated by cg2900_devices_init, alloc_chrdev_region,
+ * class_create, device_create, core_init, tty_register_ldisc,
+ * create_work_item, cg2900_char_devices_init.
+ */
+static int __init cg2900_init(void)
+{
+ int err;
+
+ CG2900_INFO("cg2900_init");
+
+ err = cg2900_devices_init();
+ if (err) {
+ CG2900_ERR("Couldn't initialize cg2900_devices");
+ return err;
+ }
+
+ core_info = kzalloc(sizeof(*core_info), GFP_KERNEL);
+ if (!core_info) {
+ CG2900_ERR("Couldn't allocate core_info");
+ return -ENOMEM;
+ }
+
+ /* Set the internal states */
+ core_info->main_state = CORE_INITIALIZING;
+ core_info->boot_state = BOOT_NOT_STARTED;
+ core_info->transport_state = TRANS_INITIALIZING;
+
+ /* Get the H4 channel ID for all channels */
+ core_info->h4_channels.bt_cmd_channel = HCI_BT_CMD_H4_CHANNEL;
+ core_info->h4_channels.bt_acl_channel = HCI_BT_ACL_H4_CHANNEL;
+ core_info->h4_channels.bt_evt_channel = HCI_BT_EVT_H4_CHANNEL;
+ core_info->h4_channels.gnss_channel = HCI_FM_RADIO_H4_CHANNEL;
+ core_info->h4_channels.fm_radio_channel = HCI_GNSS_H4_CHANNEL;
+
+ core_info->wq = create_singlethread_workqueue(CORE_WQ_NAME);
+ if (!core_info->wq) {
+ CG2900_ERR("Could not create workqueue");
+ err = -ENOMEM;
+ goto error_handling;
+ }
+
+ core_info->dev = kzalloc(sizeof(*(core_info->dev)), GFP_KERNEL);
+ if (!core_info->dev) {
+ CG2900_ERR("Couldn't allocate main device");
+ err = -ENOMEM;
+ goto error_handling_destroy_wq;
+ }
+
+ /* Prepare miscdevice struct before registering the device */
+ core_info->dev->minor = MISC_DYNAMIC_MINOR;
+ core_info->dev->name = CG2900_DEVICE_NAME;
+
+ err = misc_register(core_info->dev);
+ if (err) {
+ CG2900_ERR("Error %d registering main device!", err);
+ goto error_handling_dev_register;
+ }
+
+ core_info->chip_dev.dev = core_info->dev->this_device;
+
+ /* Create and add test char device. */
+ err = test_char_dev_create();
+ if (err)
+ goto error_handling_deregister;
+
+ /* Initialize the character devices */
+ err = cg2900_char_devices_init(core_info->dev);
+ if (err) {
+ CG2900_ERR("cg2900_char_devices_init failed %d", err);
+ goto error_handling_test_destroy;
+ }
+
+ return 0;
+
+error_handling_test_destroy:
+ test_char_dev_destroy();
+error_handling_deregister:
+ misc_deregister(core_info->dev);
+error_handling_dev_register:
+ kfree(core_info->dev);
+ core_info->dev = NULL;
+error_handling_destroy_wq:
+ destroy_workqueue(core_info->wq);
+error_handling:
+ kfree(core_info);
+ core_info = NULL;
+ return err;
+}
+
+/**
+ * cg2900_exit() - Remove module.
+ */
+static void __exit cg2900_exit(void)
+{
+ CG2900_INFO("cg2900_exit");
+
+ if (!core_info) {
+ CG2900_ERR("CG2900 Core not initiated");
+ return;
+ }
+
+ /* Remove initialized character devices */
+ cg2900_char_devices_exit();
+
+ test_char_dev_destroy();
+
+ /* Free the user devices */
+ free_user_dev(&(core_info->users.bt_cmd));
+ free_user_dev(&(core_info->users.bt_acl));
+ free_user_dev(&(core_info->users.bt_evt));
+ free_user_dev(&(core_info->users.fm_radio));
+ free_user_dev(&(core_info->users.gnss));
+ free_user_dev(&(core_info->users.debug));
+ free_user_dev(&(core_info->users.ste_tools));
+ free_user_dev(&(core_info->users.hci_logger));
+ free_user_dev(&(core_info->users.us_ctrl));
+ free_user_dev(&(core_info->users.core));
+
+ misc_deregister(core_info->dev);
+ kfree(core_info->dev);
+ core_info->dev = NULL;
+
+ destroy_workqueue(core_info->wq);
+
+ kfree(core_info);
+ core_info = NULL;
+
+ cg2900_devices_exit();
+}
+
+module_init(cg2900_init);
+module_exit(cg2900_exit);
+
+module_param(sleep_timeout_ms, int, S_IRUGO | S_IWUSR | S_IWGRP);
+MODULE_PARM_DESC(sleep_timeout_ms,
+ "Sleep timeout for data transmissions:\n"
+ "\t0 = disable <default>\n"
+ "\t>0 = sleep timeout in milliseconds");
+
+module_param(cg2900_debug_level, int, S_IRUGO | S_IWUSR | S_IWGRP);
+MODULE_PARM_DESC(cg2900_debug_level,
+ "Debug level. Default 1. Possible values:\n"
+ "\t0 = No debug\n"
+ "\t1 = Error prints\n"
+ "\t10 = General info, e.g. function entries\n"
+ "\t20 = Debug info, e.g. steps in a functionality\n"
+ "\t25 = Data info, i.e. prints when data is transferred\n"
+ "\t30 = Data content, i.e. contents of the transferred data");
+
+module_param_array(bd_address, byte, &bd_addr_count,
+ S_IRUGO | S_IWUSR | S_IWGRP);
+MODULE_PARM_DESC(bd_address,
+ "Bluetooth Device address. "
+ "Default 0x00 0x80 0xDE 0xAD 0xBE 0xEF. "
+ "Enter as comma separated value.");
+
+module_param(default_hci_revision, int, S_IRUGO | S_IWUSR | S_IWGRP);
+MODULE_PARM_DESC(default_hci_revision,
+ "Default HCI revision according to Bluetooth Assigned "
+ "Numbers.");
+
+module_param(default_manufacturer, int, S_IRUGO | S_IWUSR | S_IWGRP);
+MODULE_PARM_DESC(default_manufacturer,
+ "Default Manufacturer according to Bluetooth Assigned "
+ "Numbers.");
+
+module_param(default_sub_version, int, S_IRUGO | S_IWUSR | S_IWGRP);
+MODULE_PARM_DESC(default_sub_version,
+ "Default HCI sub-version according to Bluetooth Assigned "
+ "Numbers.");
+
+MODULE_AUTHOR("Par-Gunnar Hjalmdahl ST-Ericsson");
+MODULE_LICENSE("GPL v2");
+MODULE_DESCRIPTION("Linux Bluetooth HCI H:4 CG2900 Connectivity
Device Driver");
diff --git a/drivers/mfd/cg2900/cg2900_core.h b/drivers/mfd/cg2900/cg2900_core.h
new file mode 100644
index 0000000..dd07305
--- /dev/null
+++ b/drivers/mfd/cg2900/cg2900_core.h
@@ -0,0 +1,303 @@
+/*
+ * drivers/mfd/cg2900/cg2900_core.h
+ *
+ * Copyright (C) ST-Ericsson SA 2010
+ * Authors:
+ * Par-Gunnar Hjalmdahl (par-gunnar.p.hjalmdahl@...ricsson.com) for
ST-Ericsson.
+ * Henrik Possung (henrik.possung@...ricsson.com) for ST-Ericsson.
+ * Josef Kindberg (josef.kindberg@...ricsson.com) for ST-Ericsson.
+ * Dariusz Szymszak (dariusz.xd.szymczak@...ricsson.com) for ST-Ericsson.
+ * Kjell Andersson (kjell.k.andersson@...ricsson.com) for ST-Ericsson.
+ * License terms: GNU General Public License (GPL), version 2
+ *
+ * Linux Bluetooth HCI H:4 Driver for ST-Ericsson CG2900 GPS/BT/FM controller.
+ */
+
+#ifndef _CG2900_CORE_H_
+#define _CG2900_CORE_H_
+
+#include <linux/skbuff.h>
+#include <linux/device.h>
+
+/* Reserve 1 byte for the HCI H:4 header */
+#define CG2900_SKB_RESERVE 1
+
+#define BT_BDADDR_SIZE 6
+
+struct cg2900_h4_channels {
+ int bt_cmd_channel;
+ int bt_acl_channel;
+ int bt_evt_channel;
+ int gnss_channel;
+ int fm_radio_channel;
+ int debug_channel;
+ int ste_tools_channel;
+ int hci_logger_channel;
+ int us_ctrl_channel;
+ int core_channel;
+};
+
+/**
+ * struct cg2900_hci_logger_config - Configures the HCI logger.
+ * @bt_cmd_enable: Enable BT command logging.
+ * @bt_acl_enable: Enable BT ACL logging.
+ * @bt_evt_enable: Enable BT event logging.
+ * @gnss_enable: Enable GNSS logging.
+ * @fm_radio_enable: Enable FM radio logging.
+ * @bt_audio_enable: Enable BT audio command logging.
+ * @fm_radio_audio_enable: Enable FM radio audio command logging.
+ *
+ * Set using cg2900_write on CHANNEL_HCI_LOGGER H4 channel.
+ */
+struct cg2900_hci_logger_config {
+ bool bt_cmd_enable;
+ bool bt_acl_enable;
+ bool bt_evt_enable;
+ bool gnss_enable;
+ bool fm_radio_enable;
+ bool bt_audio_enable;
+ bool fm_radio_audio_enable;
+};
+
+/**
+ * struct cg2900_chip_info - Chip info structure.
+ * @manufacturer: Chip manufacturer.
+ * @hci_revision: Chip revision, i.e. which chip is this.
+ * @hci_sub_version: Chip sub-version, i.e. which tape-out is this.
+ *
+ * Note that these values match the Bluetooth Assigned Numbers,
+ * see http://www.bluetooth.org/
+ */
+struct cg2900_chip_info {
+ int manufacturer;
+ int hci_revision;
+ int hci_sub_version;
+};
+
+struct cg2900_chip_dev;
+
+/**
+ * struct cg2900_chip_callbacks - Callback functions registered by
chip handler.
+ * @chip_startup: Called when chip is started up.
+ * @chip_shutdown: Called when chip is shut down.
+ * @data_to_chip: Called when data shall be transmitted to chip.
+ * Return true when CG2900 Core shall not send it
+ * to chip.
+ * @data_from_chip: Called when data shall be transmitted to user.
+ * Return true when packet is taken care of by
+ * Return chip return handler.
+ * @get_h4_channel: Connects channel name with H:4 channel number.
+ * @is_bt_audio_user: Return true if current packet is for
+ * the BT audio user.
+ * @is_fm_audio_user: Return true if current packet is for
+ * the FM audio user.
+ * @last_bt_user_removed: Last BT channel user has been removed.
+ * @last_fm_user_removed: Last FM channel user has been removed.
+ * @last_gnss_user_removed: Last GNSS channel user has been removed.
+ *
+ * Note that some callbacks may be NULL. They must always be NULL
checked before
+ * calling.
+ */
+struct cg2900_chip_callbacks {
+ int (*chip_startup)(struct cg2900_chip_dev *dev);
+ int (*chip_shutdown)(struct cg2900_chip_dev *dev);
+ bool (*data_to_chip)(struct cg2900_chip_dev *dev,
+ struct cg2900_device *cg2900_dev,
+ struct sk_buff *skb);
+ bool (*data_from_chip)(struct cg2900_chip_dev *dev,
+ struct cg2900_device *cg2900_dev,
+ struct sk_buff *skb);
+ int (*get_h4_channel)(char *name, int *h4_channel);
+ bool (*is_bt_audio_user)(int h4_channel,
+ const struct sk_buff * const skb);
+ bool (*is_fm_audio_user)(int h4_channel,
+ const struct sk_buff * const skb);
+ void (*last_bt_user_removed)(struct cg2900_chip_dev *dev);
+ void (*last_fm_user_removed)(struct cg2900_chip_dev *dev);
+ void (*last_gnss_user_removed)(struct cg2900_chip_dev *dev);
+};
+
+/**
+ * struct cg2900_chip_dev - Chip handler info structure.
+ * @dev: Parent device from CG2900 Core.
+ * @chip: Chip info such as manufacturer.
+ * @cb: Callback structure for the chip handler.
+ * @user_data: Arbitrary data set by chip handler.
+ */
+struct cg2900_chip_dev {
+ struct device *dev;
+ struct cg2900_chip_info chip;
+ struct cg2900_chip_callbacks cb;
+ void *user_data;
+};
+
+/**
+ * struct cg2900_id_callbacks - Chip handler identification callbacks.
+ * @check_chip_support: Called when chip is connected. If chip is supported by
+ * driver, return true and fill in @callbacks in @dev.
+ *
+ * Note that the callback may be NULL. It must always be NULL checked before
+ * calling.
+ */
+struct cg2900_id_callbacks {
+ bool (*check_chip_support)(struct cg2900_chip_dev *dev);
+};
+
+/**
+ * struct cg2900_trans_dev - CG2900 transport info structure.
+ * @dev: Parent device from CG2900 Core.
+ * @user_data: Arbitrary data set by chip handler.
+ */
+struct cg2900_trans_dev {
+ struct device *dev;
+ void *user_data;
+};
+
+/**
+ * struct cg2900_trans_callbacks - Callback functions registered by transport.
+ * @open: CG2900 Core needs a transport.
+ * @close: CG2900 Core does not need a transport.
+ * @write: CG2900 Core transmits to the chip.
+ * @set_chip_power: CG2900 Core enables or disables the chip.
+ *
+ * Note that some callbacks may be NULL. They must always be NULL
checked before
+ * calling.
+ */
+struct cg2900_trans_callbacks {
+ int (*open)(struct cg2900_trans_dev *dev);
+ int (*close)(struct cg2900_trans_dev *dev);
+ int (*write)(struct cg2900_trans_dev *dev, struct sk_buff *skb);
+ void (*set_chip_power)(bool chip_on);
+};
+
+/**
+ * cg2900_register_chip_driver() - Register a chip handler.
+ * @cb: Callbacks to call when chip is connected.
+ *
+ * Returns:
+ * 0 if there is no error.
+ * -EINVAL if NULL is supplied as @cb.
+ * -ENOMEM if allocation fails or work queue can't be created.
+ */
+extern int cg2900_register_chip_driver(struct cg2900_id_callbacks *cb);
+
+/**
+ * cg2900_register_trans_driver() - Register a transport driver.
+ * @cb: Callbacks to call when chip is connected.
+ * @data: Arbitrary data used by the transport driver.
+ *
+ * Returns:
+ * 0 if there is no error.
+ * -EINVAL if NULL is supplied as @cb.
+ * -ENOMEM if allocation fails or work queue can't be created.
+ */
+extern int cg2900_register_trans_driver(struct cg2900_trans_callbacks *cb,
+ void *data);
+
+/**
+ * cg2900_deregister_trans_driver() - Deregister a transport driver.
+ *
+ * Returns:
+ * 0 if there is no error.
+ * -EINVAL if NULL is supplied as @cb.
+ * -ENOMEM if allocation fails or work queue can't be created.
+ */
+extern int cg2900_deregister_trans_driver(void);
+
+/**
+ * cg2900_chip_startup_finished() - Called from chip handler when
start-up is finished.
+ * @err: Result of the start-up.
+ *
+ * Returns:
+ * 0 if there is no error.
+ */
+extern int cg2900_chip_startup_finished(int err);
+
+/**
+ * cg2900_chip_shutdown_finished() - Called from chip handler when
shutdown is finished.
+ * @err: Result of the shutdown.
+ *
+ * Returns:
+ * 0 if there is no error.
+ */
+extern int cg2900_chip_shutdown_finished(int err);
+
+/**
+ * cg2900_send_to_chip() - Send data to chip.
+ * @skb: Packet to transmit.
+ * @use_logger: true if hci_logger should copy data content.
+ *
+ * Returns:
+ * 0 if there is no error.
+ */
+extern int cg2900_send_to_chip(struct sk_buff *skb, bool use_logger);
+
+/**
+ * cg2900_get_bt_cmd_dev() - Return user of the BT command H:4 channel.
+ *
+ * Returns:
+ * User of the BT command H:4 channel.
+ * NULL if no user is registered.
+ */
+extern struct cg2900_device *cg2900_get_bt_cmd_dev(void);
+
+/**
+ * cg2900_get_fm_radio_dev() - Return user of the FM radio H:4 channel.
+ *
+ * Returns:
+ * User of the FM radio H:4 channel.
+ * NULL if no user is registered.
+ */
+extern struct cg2900_device *cg2900_get_fm_radio_dev(void);
+
+/**
+ * cg2900_get_bt_audio_dev() - Return user of the BT audio H:4 channel.
+ *
+ * Returns:
+ * User of the BT audio H:4 channel.
+ * NULL if no user is registered.
+ */
+extern struct cg2900_device *cg2900_get_bt_audio_dev(void);
+
+/**
+ * cg2900_get_fm_audio_dev() - Return user of the FM audio H:4 channel.
+ *
+ * Returns:
+ * User of the FM audio H:4 channel.
+ * NULL if no user is registered.
+ */
+extern struct cg2900_device *cg2900_get_fm_audio_dev(void);
+
+/**
+ * cg2900_get_hci_logger_config() - Return HCI Logger configuration.
+ *
+ * Returns:
+ * HCI logger configuration.
+ * NULL if CG2900 Core has not yet been started.
+ */
+extern struct cg2900_hci_logger_config *cg2900_get_hci_logger_config(void);
+
+/**
+ * cg2900_get_sleep_timeout() - Return sleep timeout in jiffies.
+ *
+ * Returns:
+ * Sleep timeout in jiffies. 0 means that sleep timeout shall not be used.
+ */
+extern unsigned long cg2900_get_sleep_timeout(void);
+
+/**
+ * cg2900_data_from_chip() - Data received from connectivity controller.
+ * @skb: Data packet
+ *
+ * The cg2900_data_from_chip() function checks which channel
+ * the data was received on and send to the right user.
+ */
+extern void cg2900_data_from_chip(struct sk_buff *skb);
+
+/* module_param declared in cg2900_core.c */
+extern u8 bd_address[BT_BDADDR_SIZE];
+extern int default_manufacturer;
+extern int default_hci_revision;
+extern int default_sub_version;
+
+#endif /* _CG2900_CORE_H_ */
diff --git a/drivers/mfd/cg2900/cg2900_debug.h
b/drivers/mfd/cg2900/cg2900_debug.h
new file mode 100644
index 0000000..a3aeeaf
--- /dev/null
+++ b/drivers/mfd/cg2900/cg2900_debug.h
@@ -0,0 +1,77 @@
+/*
+ * drivers/mfd/cg2900/cg2900_debug.h
+ *
+ * Copyright (C) ST-Ericsson SA 2010
+ * Authors:
+ * Par-Gunnar Hjalmdahl (par-gunnar.p.hjalmdahl@...ricsson.com) for
ST-Ericsson.
+ * Henrik Possung (henrik.possung@...ricsson.com) for ST-Ericsson.
+ * Josef Kindberg (josef.kindberg@...ricsson.com) for ST-Ericsson.
+ * Dariusz Szymszak (dariusz.xd.szymczak@...ricsson.com) for ST-Ericsson.
+ * Kjell Andersson (kjell.k.andersson@...ricsson.com) for ST-Ericsson.
+ * License terms: GNU General Public License (GPL), version 2
+ *
+ * Debug functionality for the Linux Bluetooth HCI H:4 Driver for ST-Ericsson
+ * CG2900 connectivity controller.
+ */
+
+#ifndef _CG2900_DEBUG_H_
+#define _CG2900_DEBUG_H_
+
+#include <linux/kernel.h>
+#include <linux/types.h>
+
+#define CG2900_DEFAULT_DEBUG_LEVEL 1
+
+/* module_param declared in cg2900_core.c */
+extern int cg2900_debug_level;
+
+#if defined(NDEBUG) || CG2900_DEFAULT_DEBUG_LEVEL == 0
+ #define CG2900_DBG_DATA_CONTENT(fmt, arg...)
+ #define CG2900_DBG_DATA(fmt, arg...)
+ #define CG2900_DBG(fmt, arg...)
+ #define CG2900_INFO(fmt, arg...)
+ #define CG2900_ERR(fmt, arg...)
+#else
+ #define CG2900_DBG_DATA_CONTENT(fmt, arg...) \
+ do { \
+ if (cg2900_debug_level >= 30) \
+ printk(KERN_DEBUG "CG2900 %s: " fmt "\n" , __func__ , \
+ ## arg); \
+ } while (0)
+
+ #define CG2900_DBG_DATA(fmt, arg...) \
+ do { \
+ if (cg2900_debug_level >= 25) \
+ printk(KERN_DEBUG "CG2900 %s: " fmt "\n" , __func__ , \
+ ## arg); \
+ } while (0)
+
+ #define CG2900_DBG(fmt, arg...) \
+ do { \
+ if (cg2900_debug_level >= 20) \
+ printk(KERN_DEBUG "CG2900 %s: " fmt "\n" , __func__ , \
+ ## arg); \
+ } while (0)
+
+ #define CG2900_INFO(fmt, arg...) \
+ do { \
+ if (cg2900_debug_level >= 10) \
+ printk(KERN_INFO "CG2900: " fmt "\n" , ## arg); \
+ } while (0)
+
+ #define CG2900_ERR(fmt, arg...) \
+ do { \
+ if (cg2900_debug_level >= 1) \
+ printk(KERN_ERR "CG2900 %s: " fmt "\n" , __func__ , \
+ ## arg); \
+ } while (0)
+
+#endif /* NDEBUG */
+
+#define CG2900_SET_STATE(__name, __var, __new_state) \
+do { \
+ CG2900_DBG("New %s: 0x%X", __name, (uint32_t)__new_state); \
+ __var = __new_state; \
+} while (0)
+
+#endif /* _CG2900_DEBUG_H_ */
diff --git a/drivers/mfd/cg2900/hci_defines.h b/drivers/mfd/cg2900/hci_defines.h
new file mode 100644
index 0000000..e7f7c30
--- /dev/null
+++ b/drivers/mfd/cg2900/hci_defines.h
@@ -0,0 +1,102 @@
+/*
+ * drivers/mfd/cg2900/hci_defines.h
+ *
+ * Copyright (C) ST-Ericsson SA 2010
+ * Authors:
+ * Par-Gunnar Hjalmdahl (par-gunnar.p.hjalmdahl@...ricsson.com) for
ST-Ericsson.
+ * Henrik Possung (henrik.possung@...ricsson.com) for ST-Ericsson.
+ * Josef Kindberg (josef.kindberg@...ricsson.com) for ST-Ericsson.
+ * Dariusz Szymszak (dariusz.xd.szymczak@...ricsson.com) for ST-Ericsson.
+ * Kjell Andersson (kjell.k.andersson@...ricsson.com) for ST-Ericsson.
+ * License terms: GNU General Public License (GPL), version 2
+ *
+ * Linux Bluetooth HCI defines for ST-Ericsson CG2900 connectivity controller.
+ */
+
+#ifndef _BLUETOOTH_DEFINES_H_
+#define _BLUETOOTH_DEFINES_H_
+
+#include <linux/types.h>
+
+/* H:4 offset in an HCI packet */
+#define HCI_H4_POS 0
+#define HCI_H4_SIZE 1
+
+/* Standardized Bluetooth H:4 channels */
+#define HCI_BT_CMD_H4_CHANNEL 0x01
+#define HCI_BT_ACL_H4_CHANNEL 0x02
+#define HCI_BT_SCO_H4_CHANNEL 0x03
+#define HCI_BT_EVT_H4_CHANNEL 0x04
+
+/* Bluetooth Opcode Group Field (OGF) */
+#define HCI_BT_OGF_LINK_CTRL 0x01
+#define HCI_BT_OGF_LINK_POLICY 0x02
+#define HCI_BT_OGF_CTRL_BB 0x03
+#define HCI_BT_OGF_LINK_INFO 0x04
+#define HCI_BT_OGF_LINK_STATUS 0x05
+#define HCI_BT_OGF_LINK_TESTING 0x06
+#define HCI_BT_OGF_VS 0x3F
+
+/* Bluetooth Opcode Command Field (OCF) */
+#define HCI_BT_OCF_READ_LOCAL_VERSION_INFO 0x0001
+#define HCI_BT_OCF_RESET 0x0003
+
+/* Bluetooth HCI command OpCodes in LSB/MSB fashion */
+#define HCI_BT_RESET_CMD_LSB 0x03
+#define HCI_BT_RESET_CMD_MSB 0x0C
+#define HCI_BT_READ_LOCAL_VERSION_CMD_LSB 0x01
+#define HCI_BT_READ_LOCAL_VERSION_CMD_MSB 0x10
+
+/* Bluetooth Event OpCodes */
+#define HCI_BT_EVT_CMD_COMPLETE 0x0E
+#define HCI_BT_EVT_CMD_STATUS 0x0F
+
+/* Bluetooth Command offsets */
+#define HCI_BT_CMD_ID_POS 1
+#define HCI_BT_CMD_PARAM_LEN_POS 3
+#define HCI_BT_CMD_PARAM_POS 4
+#define HCI_BT_CMD_HDR_SIZE 4
+
+/* Bluetooth Event offsets for CG2900 users, i.e. not including H:4 channel */
+#define HCI_BT_EVT_ID_POS 0
+#define HCI_BT_EVT_LEN_POS 1
+#define HCI_BT_EVT_CMD_COMPL_ID_POS 3
+#define HCI_BT_EVT_CMD_STATUS_ID_POS 4
+#define HCI_BT_EVT_CMD_COMPL_STATUS_POS 5
+#define HCI_BT_EVT_CMD_STATUS_STATUS_POS 2
+#define HCI_BT_EVT_CMD_COMPL_NR_OF_PKTS_POS 2
+#define HCI_BT_EVT_CMD_STATUS_NR_OF_PKTS_POS 3
+
+#define HCI_BT_EVT_CMD_COMPL_ID_POS_LSB HCI_BT_EVT_CMD_COMPL_ID_POS
+#define HCI_BT_EVT_CMD_COMPL_ID_POS_MSB
(HCI_BT_EVT_CMD_COMPL_ID_POS + 1)
+#define HCI_BT_EVT_CMD_STATUS_ID_POS_LSB HCI_BT_EVT_CMD_STATUS_ID_POS
+#define HCI_BT_EVT_CMD_STATUS_ID_POS_MSB
(HCI_BT_EVT_CMD_STATUS_ID_POS + 1)
+
+/* Bluetooth error codes */
+#define HCI_BT_ERROR_NO_ERROR 0x00
+#define HCI_BT_ERROR_CMD_DISALLOWED 0x0C
+
+/* Bluetooth lengths */
+#define HCI_BT_SEND_FILE_MAX_CHUNK_SIZE 254
+
+#define HCI_BT_RESET_LEN 3
+#define HCI_BT_RESET_PARAM_LEN 0
+#define HCI_BT_CMD_COMPLETE_NO_PARAM_LEN 4
+
+/* Utility macros */
+#define GET_U16_FROM_L_ENDIAN(__u8_lsb, __u8_msb) ((u16)(__u8_lsb | \
+ (__u8_msb << 8)))
+#define HCI_BT_MAKE_FIRST_BYTE_IN_CMD(__ocf) ((u8)(__ocf & 0x00FF))
+#define HCI_BT_MAKE_SECOND_BYTE_IN_CMD(__ogf, __ocf) ((u8)(__ogf << 2) | \
+ ((__ocf >> 8) & 0x0003))
+#define HCI_BT_ID_TO_OCF(__1st_byte, __2nd_byte) ((u16)(__1st_byte | \
+ ((__2nd_byte & 0x03) << 8)))
+#define HCI_BT_ID_TO_OGF(__1st_byte) ((u8)(__1st_byte >> 2))
+#define HCI_BT_GET_ID GET_U16_FROM_L_ENDIAN
+#define HCI_BT_EVENT_GET_ID GET_U16_FROM_L_ENDIAN
+
+/* Macros to set multibyte words to correct HCI endian (always Little
Endian) */
+#define HCI_SET_U16_DATA_LSB(__u16_data) ((u8)(__u16_data & 0x00FF))
+#define HCI_SET_U16_DATA_MSB(__u16_data) ((u8)(__u16_data >> 8))
+
+#endif /* _BLUETOOTH_DEFINES_H_ */
diff --git a/include/linux/mfd/cg2900.h b/include/linux/mfd/cg2900.h
new file mode 100644
index 0000000..9c2afc5
--- /dev/null
+++ b/include/linux/mfd/cg2900.h
@@ -0,0 +1,205 @@
+/*
+ * include/linux/mfd/cg2900.h
+ *
+ * Copyright (C) ST-Ericsson SA 2010
+ * Authors:
+ * Par-Gunnar Hjalmdahl (par-gunnar.p.hjalmdahl@...ricsson.com) for
ST-Ericsson.
+ * Henrik Possung (henrik.possung@...ricsson.com) for ST-Ericsson.
+ * Josef Kindberg (josef.kindberg@...ricsson.com) for ST-Ericsson.
+ * Dariusz Szymszak (dariusz.xd.szymczak@...ricsson.com) for ST-Ericsson.
+ * Kjell Andersson (kjell.k.andersson@...ricsson.com) for ST-Ericsson.
+ * License terms: GNU General Public License (GPL), version 2
+ *
+ * Linux Bluetooth HCI H:4 Driver for ST-Ericsson CG2900 connectivity
+ * controller.
+ */
+
+#ifndef _CG2900_H_
+#define _CG2900_H_
+
+#include <linux/skbuff.h>
+
+#define CG2900_MAX_NAME_SIZE 30
+
+/*
+ * Channel names to use when registering to CG2900 driver
+ */
+
+/** CG2900_BT_CMD - Bluetooth HCI H4 channel for Bluetooth commands.
+ */
+#define CG2900_BT_CMD "cg2900_bt_cmd"
+
+/** CG2900_BT_ACL - Bluetooth HCI H4 channel for Bluetooth ACL data.
+ */
+#define CG2900_BT_ACL "cg2900_bt_acl"
+
+/** CG2900_BT_EVT - Bluetooth HCI H4 channel for Bluetooth events.
+ */
+#define CG2900_BT_EVT "cg2900_bt_evt"
+
+/** CG2900_FM_RADIO - Bluetooth HCI H4 channel for FM radio.
+ */
+#define CG2900_FM_RADIO "cg2900_fm_radio"
+
+/** CG2900_GNSS - Bluetooth HCI H4 channel for GNSS.
+ */
+#define CG2900_GNSS "cg2900_gnss"
+
+/** CG2900_DEBUG - Bluetooth HCI H4 channel for internal debug data.
+ */
+#define CG2900_DEBUG "cg2900_debug"
+
+/** CG2900_STE_TOOLS - Bluetooth HCI H4 channel for development tools data.
+ */
+#define CG2900_STE_TOOLS "cg2900_ste_tools"
+
+/** CG2900_HCI_LOGGER - BT channel for logging all transmitted H4 packets.
+ * Data read is copy of all data transferred on the other channels.
+ * Only write allowed is configuration of the HCI Logger.
+ */
+#define CG2900_HCI_LOGGER "cg2900_hci_logger"
+
+/** CG2900_US_CTRL - Channel for user space init and control of CG2900.
+ */
+#define CG2900_US_CTRL "cg2900_us_ctrl"
+
+/** CG2900_BT_AUDIO - HCI Channel for BT audio configuration commands.
+ * Maps to Bluetooth command and event channels.
+ */
+#define CG2900_BT_AUDIO "cg2900_bt_audio"
+
+/** CG2900_FM_RADIO_AUDIO - HCI channel for FM audio configuration commands.
+ * Maps to FM Radio channel.
+ */
+#define CG2900_FM_RADIO_AUDIO "cg2900_fm_audio"
+
+/** CG2900_CORE- Channel for keeping ST-Ericsson CG2900 enabled.
+ * Opening this channel forces the chip to stay powered.
+ * No data can be written to or read from this channel.
+ */
+#define CG2900_CORE "cg2900_core"
+
+struct cg2900_callbacks;
+
+/**
+ * struct cg2900_device - Device structure for CG2900 user.
+ * @h4_channel: HCI H:4 channel used by this device.
+ * @cb: Callback functions registered by this device.
+ * @logger_enabled: true if HCI logger is enabled for this channel,
+ * false otherwise.
+ * @user_data: Arbitrary data used by caller.
+ * @dev: Parent device this driver is connected to.
+ *
+ * Defines data needed to access an HCI channel.
+ */
+struct cg2900_device {
+ int h4_channel;
+ struct cg2900_callbacks *cb;
+ bool logger_enabled;
+ void *user_data;
+ struct device *dev;
+};
+
+/**
+ * struct cg2900_callbacks - Callback structure for CG2900 user.
+ * @read_cb: Callback function called when data is received from
+ * the connectivity controller.
+ * @reset_cb: Callback function called when the connectivity controller has
+ * been reset.
+ *
+ * Defines the callback functions provided from the caller.
+ */
+struct cg2900_callbacks {
+ void (*read_cb) (struct cg2900_device *dev, struct sk_buff *skb);
+ void (*reset_cb) (struct cg2900_device *dev);
+};
+
+/**
+ * struct cg2900_rev_data - Contains revision data for the local controller.
+ * @revision: Revision of the controller, e.g. to indicate that it is
+ * a CG2900 controller.
+ * @sub_version: Subversion of the controller, e.g. to indicate a certain
+ * tape-out of the controller.
+ *
+ * The values to match retrieved values to each controller may be
retrieved from
+ * the manufacturer.
+ */
+struct cg2900_rev_data {
+ int revision;
+ int sub_version;
+};
+
+/**
+ * cg2900_register_user() - Register CG2900 user.
+ * @name: Name of HCI H:4 channel to register to.
+ * @cb: Callback structure to use for the H:4 channel.
+ *
+ * Returns:
+ * Pointer to CG2900 device structure if successful.
+ * NULL upon failure.
+ */
+extern struct cg2900_device *cg2900_register_user(char *name,
+ struct cg2900_callbacks *cb);
+
+/**
+ * cg2900_deregister_user() - Remove registration of CG2900 user.
+ * @dev: CG2900 device.
+ */
+extern void cg2900_deregister_user(struct cg2900_device *dev);
+
+/**
+ * cg2900_reset() - Reset the CG2900 controller.
+ * @dev: CG2900 device.
+ *
+ * Returns:
+ * 0 if there is no error.
+ * -EACCES if driver has not been initialized.
+ */
+extern int cg2900_reset(struct cg2900_device *dev);
+
+/**
+ * cg2900_alloc_skb() - Alloc an sk_buff structure for CG2900 handling.
+ * @size: Size in number of octets.
+ * @priority: Allocation priority, e.g. GFP_KERNEL.
+ *
+ * Returns:
+ * Pointer to sk_buff buffer structure if successful.
+ * NULL upon allocation failure.
+ */
+extern struct sk_buff *cg2900_alloc_skb(unsigned int size, gfp_t priority);
+
+/**
+ * cg2900_write() - Send data to the connectivity controller.
+ * @dev: CG2900 device.
+ * @skb: Data packet.
+ *
+ * The cg2900_write() function sends data to the connectivity controller.
+ * If the return value is 0 the skb will be freed by the driver,
+ * otherwise it won't be freed.
+ *
+ * Returns:
+ * 0 if there is no error.
+ * -EACCES if driver has not been initialized or trying to write while driver
+ * is not active.
+ * -EINVAL if NULL pointer was supplied.
+ * -EPERM if operation is not permitted, e.g. trying to write to a channel
+ * that doesn't handle write operations.
+ * Error codes returned from core_enable_hci_logger.
+ */
+extern int cg2900_write(struct cg2900_device *dev, struct sk_buff *skb);
+
+/**
+ * cg2900_get_local_revision() - Read revision of the connected controller.
+ * @rev_data: Revision data structure to fill. Must be allocated by caller.
+ *
+ * The cg2900_get_local_revision() function returns the revision data of the
+ * local controller if available. If data is not available, e.g. because the
+ * controller has not yet been started this function will return false.
+ *
+ * Returns:
+ * true if revision data is available.
+ * false if no revision data is available.
+ */
+extern bool cg2900_get_local_revision(struct cg2900_rev_data *rev_data);
+
+#endif /* _CG2900_H_ */
--
1.6.3.3
--
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